In this video, we have explained how does the wheel size affect the acceleration of the vehicle.
Пікірлер
Not quite correct this time: The referenced 15" to 19" decrease in acceleration is not due to the change in the distance between the road and the axis of rotation of the wheel (19" wheels will use a lower profile tire, so the actual radius from axis to road remains the same). The actual reason is that, in a larger wheel, the mass of the wheel is greater and distributed further from the axis of rotation, thefore increasing its polar moment of inertia. Rotational acceleration of the wheel = Torque/(moment of inertia). Therefore, if the moment of inertia increases, the wheel will spin up more slowly, even if the outer radius is identical for both wheels. A wheel with larger moment of inertia would spin up more slowly (think of each wheel+tire as a flywheel...). Additionally, the negative impact to performance is also evidenced in braking performance. Keep up the great work. I enjoy your content.
@daviasdf4 жыл бұрын
You are absolutely right. If polar moment of inertia increases the performance definitely degrades. However the increased inertia is does not require significantly more force ( as the force required for the car to move is way too much, relatively wheel size increase adds nothing ). Last year I swapped old wheels which were heavier and smaller with new alloys which are bigger and significantly lighter. Polar moment of inertia was the only reason to spend more for lighter. The acceleration and fuel economy still suffered, while top speed increased but it taks way to much time to reach. As we all know, more weight definitely ruins the performance, but the drastic change in performance due to different wheel sizes, is more likely due to the force it can put on road. It's my observation, from my failed experiment last year. You can still differ with my opinion. If you find some solution for my new alloys sitting in garage, do let me know.
@abhijeetbhoyar8274 жыл бұрын
@@abhijeetbhoyar827 Sorry to nerd-out, but here we go. Assuming NO CHANGE in outer tire diameter: The force applied at the contact patch remains constant because F=T/d and 'd' remains constant. However, by increasing the wheel size there is an increase in overall rotating mass (there's slightly less tire mass due to the shorter side wall, but this is more tahn offset by the increase in mass the wheel due to the larger diameter of the cylindrical portion and longer spokes) but this effect is minimal. What IS impactful is where this mass is placed relative to the axis of rotation. If we just consider the mass of the cylindrical portion of the 15" wheel being redistributed at a 17" diameter, the polar moment would increase as follows: MoI=2*t*(R^3). Therefore, assuming a thin-walled, constant thickness: MoI for 15"= 844*t, MoI for 17" = 1228*t, which is 45% larger. This means significantly more energy needs to go into spinning up the wheel instead of driving the vehicle forward (and conversely more brake force is needed to decelerate the rotation of the wheel). Now, if we want to cover changes in tire diameter then it just becomes a simple gearing question, which really isn't as nuanced a problem.
@daviasdf4 жыл бұрын
Relative to total radius size, it's ~ 1/r for acceleration. But with the same total wheel and tire size, it's relative to inertia ratio, less penalty than changing whole radius
@rondhole4 жыл бұрын
@@daviasdf + you forgot friction, bc 19" tires usually have a bigger contact patch
@RLwarr3 жыл бұрын
@@RLwarr It's been a while since I wrote that, but: if you note my first comment, I was explicitly comparing two wheels of different diameters where the outer diameter of the tires remain constant, therefore no change in contact patch (nor friction). However, if you want to consider a case where outer diameters are different, the gearing effect discussed in the video would dominate. The impact of friction due to increased contact patch would be negligible, and would probably be offset by the corresponding reduction in rolling resistance.
@daviasdf3 жыл бұрын
This video does not include the added horse power you get from stickers.
@johneppstv3 жыл бұрын
😂
@nikostyson3255 Жыл бұрын
Great video! In discussion with other car people about wheel size, there is a sometimes confusion with the torque affects on acceleration vs breaking. A video dealing with the differences would be helpful.
@see231002 жыл бұрын
I just wanted to know why my shiny knew 18.5 GT wheels are slower than my 17’ bullet wheels and I walked into a room full of mathematicians 😔
@shaun787max3 жыл бұрын
Don't doubt yourself dude, thats how you learn. If you want to get better at something dont be scared to fail
@annmatiskam45713 жыл бұрын
Lol 😆 facts
@deondraproctor59633 жыл бұрын
Don’t I’m looking about to buy a classic beetle and I’m stressing cus I’m not going to be running stock wheels. But I need to consider the rim size and tyre profile and work all that shit our cus of the different gearing set ups. Pretty much need to work out which combination works out best without causing any problems. N I’m stressed I don’t do maths I’m just watching as many videos as possible cus I can’t grasp the concept of basic maths 😂😂😂😂😂😂😂😂
@neavecorr97582 жыл бұрын
You can still take night classes. Knowledge is power.
@ericg21672 жыл бұрын
except i don t wanna get better at physiscs or math, my existence has nothing to do with them, we just wanted to know if smaller wheels are faster thats it@@annmatiskam4571
@VladRadu-tq1pg5 ай бұрын
very good video, well explained , thank you for knowledge , helped mt a lot, cant thank you enough . Pls make more video on mechanical/ automobile
@rajaryanigdncxhadk40903 жыл бұрын
Very informative video thank you 🙏
@darryl34073 жыл бұрын
Badhiya samjhaaya brother. Kudos!
@Anshul16143 жыл бұрын
A test has been done between a bmx, a mountain bike and a road bike (it's on KZhead btw). On 100 meters the bmx won but over this distance it was the road bike.
@franco9122 жыл бұрын
wow - GREAT explaining ;) MORE PLZ
@mba2ceo Жыл бұрын
Guys listen just get your factory rims dipped in black chrome or rose gold and be done with it or go to a rim shop and let them hook it up nice.
@DTechnologyservices3 жыл бұрын
thank you for a very simple explanation
@abuharris4222 Жыл бұрын
Very informative..... thx👍
@zackhod86612 жыл бұрын
thanks! i needed this to understand beam.ng drive physics
@jackcprime3 жыл бұрын
There's even more effect....lift the car off the ground, and think about the axle force eaten up just to get the wheels spinning faster....which goes up as wheel-radius squared. The 10% smaller wheel has 20% less rotational inertia. This effect adds even more to the "sprinter effect" of smaller tires. The braking system will be more assertive, for the same reasons discussed here.
@pbierre3 жыл бұрын
Do the top speed matters also on wheels as it does on tires ?
@MrDahkilla2 жыл бұрын
The stock 0 to 60 in my Challenger SRT8 was 4.9 with 20" wheels and runs in 4.6 after switching to 17s, so I can confirm what he says is true and will do even better after airing down the tires because that was at full air pressure and still spins a little. I should add that it has 305 Mickey Thompson drag radials and just got them on recently when we replaced the rims, plus that was on a freeway ramp entrance and on an incline. So on a flat surface with about 15 psi, it should hook well and think that I should be able to get close to 4. Especially if I can master the line lock as launch control, but you have to throttle the RPMs just right and know when to engage or it spins like crazy and just goes up in smoke lol. It looks cool, but you're not winning if you're spinin
@lovethesmellofracefuelinth73743 жыл бұрын
Your wheels got smaller, but your tire height stayed the same as when you had 20s because you have more sidewall now. Your time got better because you have a wider tires/wheels, lighter wheels, better tires that stick, and you can utilize the benefit of lowering air pressure. 20s with a low profile tire are trash for racing.
@knull1320 Жыл бұрын
Now you have a problem. Smaller tires will take you longer to get to speeds over 75mph and up to top speed🤓
@great159 Жыл бұрын
thats just bullshit, top speed wise sure, but the acceleration is better@@great159
@VladRadu-tq1pg5 ай бұрын
Question, does weight matter at all when taking into account the wheel size. Because also getting smaller wheels would be lighter too right
@Frosty-dr8bs21 күн бұрын
I think I have heard your voice from some other channels... Do you have any other channels?
@DanielD199512143 жыл бұрын
over 12 miles say your milage reading will be less on larger wheel, then also on the car test the brakes are less effective on large wheels
@buffi9442 жыл бұрын
It's the same concept if you have a manual transmission. You will not stall the engine if you start from 1st gear then if you start from 4th gear.
@objective70422 жыл бұрын
Very good video.
@blackhawkedu14 ай бұрын
it similar to increase or decrease final drive ratio by just change bigger or smaller wheel.
@user-zn7rl1en7s Жыл бұрын
Please example Y the acceleration is finite if the FORCE is constant ?
@mba2ceo Жыл бұрын
So I put 265/35/R18 wheels and tires on my car it will go faster then it does with the 245/30R20s? Is this correct? So essentially my tires are smaller but wider with the new measures.
@Shmalex13 жыл бұрын
Yes smaller wheels are faster
@chinchy1112 жыл бұрын
Thanks for trying to explain some. The change of wheel size only change moment of inertia, results in lower angular acceleration or acceleration since the total radius of the wheel with tires the same. Changing total wheel and tire sizes changed the moment of inertia. I ~ mr2 and reduce total acceleration because larger r with the road as the axis. Accelerating a= alpha x r . Alpha is Torque/ inertia. So acceleration ~ 1/r .
@rondhole4 жыл бұрын
Damnit you know I dont speak Chinese
@johneppstv3 жыл бұрын
@@johneppstv no its Trump's supporter language.
@rondhole3 жыл бұрын
@@rondhole ~ means about equal to right? What's mr2? What's trump language? Did you mean actual facts being misunderstood?
@johneppstv3 жыл бұрын
@@johneppstv it is high school physics about moment of inertia, I = M R^2, R radius from axle, M is mass. The larger your tires, the bigger the inertia, harder to rotate with the same torque. Torque from your engine is constant. So, the acceleration ~ 1/R . Smaller tire/wheel gives faster acceleration, easier to climb on hill. But at cruise speed, larger wheel may be more efficient because RPM on engine is smaller but the load in engine is larger. Manufacturer already calculated which size of wheel is optimum. Too big = no power, harder to accelerate, too small = bad for cruise speed efficiency when the load small, but engine rpm is high.
@rondhole3 жыл бұрын
@@johneppstv So, For the same Total radius (rims+tires) : it is better to use smaller rims and narrow tires. You can get good acceleration and efficient cruise. The worst combination is large rims, wide tires. But we pay for the looks and handling of large rims and wide tires in cost of fuel Efficiency, power, price, and comfort (harsh on bumps).
@rondhole3 жыл бұрын
Nice
@jayshreedeshpande69124 жыл бұрын
I think some of you in the comments are confused. He's talking about overall diameter although he's generalizing saying "wheels". But regardless of the math it's hard to fathom because in a drag race, having a larger diameter / circumference (w/o exaggeration) you'd cover more ground with less power. Although the smaller diameter will complete it's rotation sooner, it has covered less distance than the larger one. So during the course of the race with identical cars, the one with the larger tires will be overtaking the one with less diameter.
@obtrunco2 жыл бұрын
Yeah I was thinking about this too. Like, off the line, 0-60, the smaller wheel will win (by a smidge), but I bet in a street start (10-70) the big wheel will win.
@SliderFury12 жыл бұрын
@@SliderFury1 But I'd really like to see this experiment in a real life scenario though not a computer simulation. There's more to it too. Certain tire diameters workout better depending on the size of the car as well but here's a lot more I guess including gearing, HP etc.
@obtrunco2 жыл бұрын
there is also the benefit of larger diameter wheels that prevents it from spinning and losing tractuon just because of its larger mass and moment of inertia so you can floor the throttle in standstill instead of feathering it/launch control
@giwtwm Жыл бұрын
so what i would like to know is if bigger wheels add performance on cars that have to much power for the wheels and if not launched at the right rpm will spin. if wider tires help or hurt performance. weight of extra wheels vs more grip to put down unused power
@racereid1923 жыл бұрын
Adding extra wheels will increase the friection between the road and tires. When you want to pull away very quickly, that would be good - The wheels would be less likely to spin and lose grip. However, when up to speed and driving normally, the extra friction would be a hinderance, and reduce the economy of the car. Essentially lowering the top speed of the car. So a car with 4 wheels might be able to accelerate at 1mps2, and have a top crusing speed of 100mph. But a car with 8 wheels might have an acceleration rateof 2mps2. But have a top speed of 90mph. It doesn't sound like a big difference. But over the life of the car, you'd spend significantly more on fuel to compensate for the deformation of the additional tires when rolling along.
@dancoulson65793 жыл бұрын
hi brother, my car engine is 1.5cc and the original stock rim is 16 inch with tire size is 205/45/16..... if i change to 15 inch with tire size 195/50/15 is it suitable..... can i have your opinion... thank you
@reezalal-firuz1803 жыл бұрын
Approximately the same.
@15et182 жыл бұрын
Hold up. Is it the smaller size or the weight reduction causing the improvements….?
@SIIKAP12 жыл бұрын
Easy to understand
@yagami412 жыл бұрын
Thanks for sharing this in English
@barneyboyle6933 Жыл бұрын
Link to the article mate.......
@Shaylesety2 жыл бұрын
Ah this is why my E200 with 15" rims is faster than my E230 with 19" rims. I knew it hehe my friend was bragging that he won
@abdullahz48043 жыл бұрын
faster acceleration yes, but lower top speed
@rosswithers2396 Жыл бұрын
it is Wright I agreed. Be for I Chang my rim its so fast now the speed is so slow 10% and the fuel consumption is increased by 10% 185/70/13". is faster than . 195/55/15"
@admeethiotube89253 жыл бұрын
Isn’t this only true up to the amount of torque the wheels/tires can handle before slipping? Non sports cars might not reach this limit, but performance cars can easily exceed grip, requiring larger wheels to maximize acceleration.
@stevedekorte4 жыл бұрын
I don't see how it would make a difference when it comes to loss of traction, as long as the tyres are the same width then they should have the same 'footprint' no matter how large or small the wheel is. They would start to break traction at the same point of acceleration, to fix that you'd make them wider not larger.
@Roger__Wilco4 жыл бұрын
@@Roger__Wilco diameter of the tire also impacts contact patch size. Prime example is the BMW i3. Tire width is a humorous 155, but because the diameter is so large, the contact patch is equal to a Mini Cooper's (which has little wide tires).
@daviasdf4 жыл бұрын
@@Roger__Wilco damn. Good point. At a certain size I'd imagine a large wheel has more foot print then a smaller one at the Same width. But a tractor tire. Nothing car sized.
@johneppstv3 жыл бұрын
That's why an Audi RSQ8 with >600hp has 23in wheels whilst a Toyota Corrola has 169hp and 16in wheels.
@Scotford_Maconochie8 ай бұрын
It’s true that smaller diameter wheel will produce overall more wheel torque. But yor car’s acceleration depends on multiple factors. If your wheels produces more torque than the limit of friction of your tires, you are not gonna accelerate any faster. Your wheels will just freely spin at peak torque. Instead, larger diameter wheels will make you go faster. This is why you don’t put 15 inch on a Tesla with low profile tires, nor on a Koenigsegg Regera.
@RexinOridle Жыл бұрын
What happens if total circumference is little less than stock when you go from 17x7, 215 40 17, to 15x6.5 205 50 15? My spedo is 5 miles faster than actual speed. I.e. 30 is actually 25 mph, or 75 is actually 70 mph etc.
@stevel.27592 жыл бұрын
I have toyota carina 1.6 1996 years and nothing special. It was 185/65/14, now 185/60/14. Car its 2cm lower, and i feel better acceleration. Faster rpm grow up. And better fuel consumption about 0.2liters/100km. Its verry repeated and accurate. Car has now higher rpm on the same gear on about 100rpm, but not more consumption. And v max drop about 12km/h but i dont care this. I drive max about 80miles. Its about 125km/h. And with city 40-45miles. If You ride a slow car with gasoline, and non turbo You should take oe size wheels and tires or 1 size les, but remember car shorts gear, and 2cm lower, but better aerodynamics, and fuel and normal drive acceleration. But if You have turbo car diesel and petrol i think diesel about 150 horsepower, and 200 for gasiline turbo, You can apply wider, and bigger tires than stoc, but not bigger than claims with oe car. In the future i think to got a supercharger my engine and about 170horsepower and tires 195/55 with 15inch its the best. Sorry for my english. :D
@smacznego413310 ай бұрын
So Smaller Wheels will give more Accelaration and Larger wheels will More Top Speed right? and also, what's up with tractors using big rear wheels..
@Roger-uz3bh2 жыл бұрын
It's like dirt bike and supermoto
@lastdevil49833 ай бұрын
To make this fair you need to put lower gear ratio in the car with the taller wheels and tires so final drive speed is the same at the same RPM
@DanneyTanner2 жыл бұрын
no it's the opposite
@rosswithers2396 Жыл бұрын
Bigger wheel, longer range. For Tesla they use a different gear ratio for long range vehicles
@eddieyutub2 жыл бұрын
What if bigger wheel is forged and lighter than small wheel. That may counter some of the offset🤔
@rogermcdowell86292 жыл бұрын
yes but it will cost you $200,000
@giwtwm Жыл бұрын
What about the top end
@lastdevil49833 ай бұрын
Quicker spin quicker to deteriorate
@t-90atank352 жыл бұрын
Hello there, I have a small Suzuki hatchback with a 1.0L 3cyl engine. Stock wheel size is 155/65/14, if I downsize to a 13 inch and a 155/80/13 taller tire would it give me an improvement over fuel mileage as well as comfort?
@angelo44453 жыл бұрын
Buy a less shitty car
@TheTranfan3 жыл бұрын
@@TheTranfan hahah
@HustleSoundz3 жыл бұрын
speedometer showing wrong numbers when changing rim size?
@MahdioofDrift2 жыл бұрын
Yes. But the difference is no rapid.
@HondaK202 жыл бұрын
Smaller rims but high tire profile vs Wider rims with low tire profile, what is the difference if they have the same wheel circumference?
@loonylinn88243 жыл бұрын
I read that the wider the tire, the more air resistance it creates as well as rolling resistance as the contact patch is wider.. If the outer diameter is the same it will have little affect.
@brucesmith69423 жыл бұрын
Same question that I had in my mind, will there be any difference between let’s say 15” and 17” wheels if they have same overall diameter because of the tires.
@bienpao3 жыл бұрын
@@bienpao I may be wrong but I think this is assuming a smaller tire size in addition to the smaller wheel. It should probably be using the term "overall tire diameter". Someone correct me if I'm understanding this incorrectly.
@jakeaaron2 жыл бұрын
Man is smaller wheels faster or not?
@the_batmobile0.414 күн бұрын
We would get more acceleration and our car would be lowered too? Wow thats two birds with one stone. Seems too good to be true just for buying smaller diameter tires! No wonder they dont advertise that to us.
@Tropicsca3 жыл бұрын
you explaination and the given example is whack. Yes bigger is bad for acceleration, but the example at the end with the Golf was slower due to friction increase because there are no 19 inch tires with 195mm width. If your 19" wheel with the tire on has the same circumfrence as the 15" with tire on, the only 2 factors affecting acceleration are rotational mass and friction.
@RLwarr3 жыл бұрын
So just to confirm, if I run say 18s instead of say 20s on my car, the 18s will do better for the 0-100 acceleration than the 18s? But vice versa for maybe 100-200?
@shaun-alexwalsh7888 Жыл бұрын
AffectS
@leogomez90142 жыл бұрын
This video got a lot wrong and doesn't take a lot into consideration. A 17 inch wheel with a high profile tire will out perform any 15 inch wheel with a low profile tire. There is a lot that factors into this logic with racing. Plus what type of racing? A lighter wheel, higher profile tire will out perform in a straight line. This video is definitely made by someone who likes European cars and doesn't race. 15-18 inch wheels with a high profile tire for drag, or 19s with a low profile tire for track. 20s are garbage. Again it all depends on factors. Are we talking street cars, drag cars, F1, promods, top fuel?
@knull1320 Жыл бұрын
More acceleration but lost top speed
@intifadhatimur23 Жыл бұрын
So you need to downsize at least 3 inches for a 0.3 sec improvement from 0-60? That's not really nice. Might as well just pick lighter tires and rims isn't it
@kewtheii6764 Жыл бұрын
The Range is opposite!
@eddieyutub2 жыл бұрын
Trade off to smaller tires is it will take you longer to get to speeds over 75mph to top speed of your vehicle. 0-75mph is a blast, 75mph and up is a snail. This is from my own experience.
@great159 Жыл бұрын
XD nope..smaller with slow car with maximum 200 horsepower its maximum 15" 205/50 its soo much better than 17/18 205/205/35.
@smacznego413310 ай бұрын
Yes. R19 vs R16 is different but. Most important is weight. If you have R18 with 16kg and R17 with 19kg car with R18 run faster and acceleration better. Different spin on 1km R17/R18 is 6 turn. 482/488 per 1km. And 8 turn on 1km don’t matter..
@HondaK202 жыл бұрын
You may want to say tire diameter because wheel size is irrelevant in this case.
@ericg21672 жыл бұрын
Wheel size can work the other way around = being more advantageous as they increase in diameter if only torque / force could be applied ... a little more ingenious ;)
Not quite correct this time: The referenced 15" to 19" decrease in acceleration is not due to the change in the distance between the road and the axis of rotation of the wheel (19" wheels will use a lower profile tire, so the actual radius from axis to road remains the same). The actual reason is that, in a larger wheel, the mass of the wheel is greater and distributed further from the axis of rotation, thefore increasing its polar moment of inertia. Rotational acceleration of the wheel = Torque/(moment of inertia). Therefore, if the moment of inertia increases, the wheel will spin up more slowly, even if the outer radius is identical for both wheels. A wheel with larger moment of inertia would spin up more slowly (think of each wheel+tire as a flywheel...). Additionally, the negative impact to performance is also evidenced in braking performance. Keep up the great work. I enjoy your content.
You are absolutely right. If polar moment of inertia increases the performance definitely degrades. However the increased inertia is does not require significantly more force ( as the force required for the car to move is way too much, relatively wheel size increase adds nothing ). Last year I swapped old wheels which were heavier and smaller with new alloys which are bigger and significantly lighter. Polar moment of inertia was the only reason to spend more for lighter. The acceleration and fuel economy still suffered, while top speed increased but it taks way to much time to reach. As we all know, more weight definitely ruins the performance, but the drastic change in performance due to different wheel sizes, is more likely due to the force it can put on road. It's my observation, from my failed experiment last year. You can still differ with my opinion. If you find some solution for my new alloys sitting in garage, do let me know.
@@abhijeetbhoyar827 Sorry to nerd-out, but here we go. Assuming NO CHANGE in outer tire diameter: The force applied at the contact patch remains constant because F=T/d and 'd' remains constant. However, by increasing the wheel size there is an increase in overall rotating mass (there's slightly less tire mass due to the shorter side wall, but this is more tahn offset by the increase in mass the wheel due to the larger diameter of the cylindrical portion and longer spokes) but this effect is minimal. What IS impactful is where this mass is placed relative to the axis of rotation. If we just consider the mass of the cylindrical portion of the 15" wheel being redistributed at a 17" diameter, the polar moment would increase as follows: MoI=2*t*(R^3). Therefore, assuming a thin-walled, constant thickness: MoI for 15"= 844*t, MoI for 17" = 1228*t, which is 45% larger. This means significantly more energy needs to go into spinning up the wheel instead of driving the vehicle forward (and conversely more brake force is needed to decelerate the rotation of the wheel). Now, if we want to cover changes in tire diameter then it just becomes a simple gearing question, which really isn't as nuanced a problem.
Relative to total radius size, it's ~ 1/r for acceleration. But with the same total wheel and tire size, it's relative to inertia ratio, less penalty than changing whole radius
@@daviasdf + you forgot friction, bc 19" tires usually have a bigger contact patch
@@RLwarr It's been a while since I wrote that, but: if you note my first comment, I was explicitly comparing two wheels of different diameters where the outer diameter of the tires remain constant, therefore no change in contact patch (nor friction). However, if you want to consider a case where outer diameters are different, the gearing effect discussed in the video would dominate. The impact of friction due to increased contact patch would be negligible, and would probably be offset by the corresponding reduction in rolling resistance.
This video does not include the added horse power you get from stickers.
😂
Great video! In discussion with other car people about wheel size, there is a sometimes confusion with the torque affects on acceleration vs breaking. A video dealing with the differences would be helpful.
I just wanted to know why my shiny knew 18.5 GT wheels are slower than my 17’ bullet wheels and I walked into a room full of mathematicians 😔
Don't doubt yourself dude, thats how you learn. If you want to get better at something dont be scared to fail
Lol 😆 facts
Don’t I’m looking about to buy a classic beetle and I’m stressing cus I’m not going to be running stock wheels. But I need to consider the rim size and tyre profile and work all that shit our cus of the different gearing set ups. Pretty much need to work out which combination works out best without causing any problems. N I’m stressed I don’t do maths I’m just watching as many videos as possible cus I can’t grasp the concept of basic maths 😂😂😂😂😂😂😂😂
You can still take night classes. Knowledge is power.
except i don t wanna get better at physiscs or math, my existence has nothing to do with them, we just wanted to know if smaller wheels are faster thats it@@annmatiskam4571
very good video, well explained , thank you for knowledge , helped mt a lot, cant thank you enough . Pls make more video on mechanical/ automobile
Very informative video thank you 🙏
Badhiya samjhaaya brother. Kudos!
A test has been done between a bmx, a mountain bike and a road bike (it's on KZhead btw). On 100 meters the bmx won but over this distance it was the road bike.
wow - GREAT explaining ;) MORE PLZ
Guys listen just get your factory rims dipped in black chrome or rose gold and be done with it or go to a rim shop and let them hook it up nice.
thank you for a very simple explanation
Very informative..... thx👍
thanks! i needed this to understand beam.ng drive physics
There's even more effect....lift the car off the ground, and think about the axle force eaten up just to get the wheels spinning faster....which goes up as wheel-radius squared. The 10% smaller wheel has 20% less rotational inertia. This effect adds even more to the "sprinter effect" of smaller tires. The braking system will be more assertive, for the same reasons discussed here.
Do the top speed matters also on wheels as it does on tires ?
The stock 0 to 60 in my Challenger SRT8 was 4.9 with 20" wheels and runs in 4.6 after switching to 17s, so I can confirm what he says is true and will do even better after airing down the tires because that was at full air pressure and still spins a little. I should add that it has 305 Mickey Thompson drag radials and just got them on recently when we replaced the rims, plus that was on a freeway ramp entrance and on an incline. So on a flat surface with about 15 psi, it should hook well and think that I should be able to get close to 4. Especially if I can master the line lock as launch control, but you have to throttle the RPMs just right and know when to engage or it spins like crazy and just goes up in smoke lol. It looks cool, but you're not winning if you're spinin
Your wheels got smaller, but your tire height stayed the same as when you had 20s because you have more sidewall now. Your time got better because you have a wider tires/wheels, lighter wheels, better tires that stick, and you can utilize the benefit of lowering air pressure. 20s with a low profile tire are trash for racing.
Now you have a problem. Smaller tires will take you longer to get to speeds over 75mph and up to top speed🤓
thats just bullshit, top speed wise sure, but the acceleration is better@@great159
Question, does weight matter at all when taking into account the wheel size. Because also getting smaller wheels would be lighter too right
I think I have heard your voice from some other channels... Do you have any other channels?
over 12 miles say your milage reading will be less on larger wheel, then also on the car test the brakes are less effective on large wheels
It's the same concept if you have a manual transmission. You will not stall the engine if you start from 1st gear then if you start from 4th gear.
Very good video.
it similar to increase or decrease final drive ratio by just change bigger or smaller wheel.
Please example Y the acceleration is finite if the FORCE is constant ?
So I put 265/35/R18 wheels and tires on my car it will go faster then it does with the 245/30R20s? Is this correct? So essentially my tires are smaller but wider with the new measures.
Yes smaller wheels are faster
Thanks for trying to explain some. The change of wheel size only change moment of inertia, results in lower angular acceleration or acceleration since the total radius of the wheel with tires the same. Changing total wheel and tire sizes changed the moment of inertia. I ~ mr2 and reduce total acceleration because larger r with the road as the axis. Accelerating a= alpha x r . Alpha is Torque/ inertia. So acceleration ~ 1/r .
Damnit you know I dont speak Chinese
@@johneppstv no its Trump's supporter language.
@@rondhole ~ means about equal to right? What's mr2? What's trump language? Did you mean actual facts being misunderstood?
@@johneppstv it is high school physics about moment of inertia, I = M R^2, R radius from axle, M is mass. The larger your tires, the bigger the inertia, harder to rotate with the same torque. Torque from your engine is constant. So, the acceleration ~ 1/R . Smaller tire/wheel gives faster acceleration, easier to climb on hill. But at cruise speed, larger wheel may be more efficient because RPM on engine is smaller but the load in engine is larger. Manufacturer already calculated which size of wheel is optimum. Too big = no power, harder to accelerate, too small = bad for cruise speed efficiency when the load small, but engine rpm is high.
@@johneppstv So, For the same Total radius (rims+tires) : it is better to use smaller rims and narrow tires. You can get good acceleration and efficient cruise. The worst combination is large rims, wide tires. But we pay for the looks and handling of large rims and wide tires in cost of fuel Efficiency, power, price, and comfort (harsh on bumps).
Nice
I think some of you in the comments are confused. He's talking about overall diameter although he's generalizing saying "wheels". But regardless of the math it's hard to fathom because in a drag race, having a larger diameter / circumference (w/o exaggeration) you'd cover more ground with less power. Although the smaller diameter will complete it's rotation sooner, it has covered less distance than the larger one. So during the course of the race with identical cars, the one with the larger tires will be overtaking the one with less diameter.
Yeah I was thinking about this too. Like, off the line, 0-60, the smaller wheel will win (by a smidge), but I bet in a street start (10-70) the big wheel will win.
@@SliderFury1 But I'd really like to see this experiment in a real life scenario though not a computer simulation. There's more to it too. Certain tire diameters workout better depending on the size of the car as well but here's a lot more I guess including gearing, HP etc.
there is also the benefit of larger diameter wheels that prevents it from spinning and losing tractuon just because of its larger mass and moment of inertia so you can floor the throttle in standstill instead of feathering it/launch control
so what i would like to know is if bigger wheels add performance on cars that have to much power for the wheels and if not launched at the right rpm will spin. if wider tires help or hurt performance. weight of extra wheels vs more grip to put down unused power
Adding extra wheels will increase the friection between the road and tires. When you want to pull away very quickly, that would be good - The wheels would be less likely to spin and lose grip. However, when up to speed and driving normally, the extra friction would be a hinderance, and reduce the economy of the car. Essentially lowering the top speed of the car. So a car with 4 wheels might be able to accelerate at 1mps2, and have a top crusing speed of 100mph. But a car with 8 wheels might have an acceleration rateof 2mps2. But have a top speed of 90mph. It doesn't sound like a big difference. But over the life of the car, you'd spend significantly more on fuel to compensate for the deformation of the additional tires when rolling along.
hi brother, my car engine is 1.5cc and the original stock rim is 16 inch with tire size is 205/45/16..... if i change to 15 inch with tire size 195/50/15 is it suitable..... can i have your opinion... thank you
Approximately the same.
Hold up. Is it the smaller size or the weight reduction causing the improvements….?
Easy to understand
Thanks for sharing this in English
Link to the article mate.......
Ah this is why my E200 with 15" rims is faster than my E230 with 19" rims. I knew it hehe my friend was bragging that he won
faster acceleration yes, but lower top speed
it is Wright I agreed. Be for I Chang my rim its so fast now the speed is so slow 10% and the fuel consumption is increased by 10% 185/70/13". is faster than . 195/55/15"
Isn’t this only true up to the amount of torque the wheels/tires can handle before slipping? Non sports cars might not reach this limit, but performance cars can easily exceed grip, requiring larger wheels to maximize acceleration.
I don't see how it would make a difference when it comes to loss of traction, as long as the tyres are the same width then they should have the same 'footprint' no matter how large or small the wheel is. They would start to break traction at the same point of acceleration, to fix that you'd make them wider not larger.
@@Roger__Wilco diameter of the tire also impacts contact patch size. Prime example is the BMW i3. Tire width is a humorous 155, but because the diameter is so large, the contact patch is equal to a Mini Cooper's (which has little wide tires).
@@Roger__Wilco damn. Good point. At a certain size I'd imagine a large wheel has more foot print then a smaller one at the Same width. But a tractor tire. Nothing car sized.
That's why an Audi RSQ8 with >600hp has 23in wheels whilst a Toyota Corrola has 169hp and 16in wheels.
It’s true that smaller diameter wheel will produce overall more wheel torque. But yor car’s acceleration depends on multiple factors. If your wheels produces more torque than the limit of friction of your tires, you are not gonna accelerate any faster. Your wheels will just freely spin at peak torque. Instead, larger diameter wheels will make you go faster. This is why you don’t put 15 inch on a Tesla with low profile tires, nor on a Koenigsegg Regera.
What happens if total circumference is little less than stock when you go from 17x7, 215 40 17, to 15x6.5 205 50 15? My spedo is 5 miles faster than actual speed. I.e. 30 is actually 25 mph, or 75 is actually 70 mph etc.
I have toyota carina 1.6 1996 years and nothing special. It was 185/65/14, now 185/60/14. Car its 2cm lower, and i feel better acceleration. Faster rpm grow up. And better fuel consumption about 0.2liters/100km. Its verry repeated and accurate. Car has now higher rpm on the same gear on about 100rpm, but not more consumption. And v max drop about 12km/h but i dont care this. I drive max about 80miles. Its about 125km/h. And with city 40-45miles. If You ride a slow car with gasoline, and non turbo You should take oe size wheels and tires or 1 size les, but remember car shorts gear, and 2cm lower, but better aerodynamics, and fuel and normal drive acceleration. But if You have turbo car diesel and petrol i think diesel about 150 horsepower, and 200 for gasiline turbo, You can apply wider, and bigger tires than stoc, but not bigger than claims with oe car. In the future i think to got a supercharger my engine and about 170horsepower and tires 195/55 with 15inch its the best. Sorry for my english. :D
So Smaller Wheels will give more Accelaration and Larger wheels will More Top Speed right? and also, what's up with tractors using big rear wheels..
It's like dirt bike and supermoto
To make this fair you need to put lower gear ratio in the car with the taller wheels and tires so final drive speed is the same at the same RPM
no it's the opposite
Bigger wheel, longer range. For Tesla they use a different gear ratio for long range vehicles
What if bigger wheel is forged and lighter than small wheel. That may counter some of the offset🤔
yes but it will cost you $200,000
What about the top end
Quicker spin quicker to deteriorate
Hello there, I have a small Suzuki hatchback with a 1.0L 3cyl engine. Stock wheel size is 155/65/14, if I downsize to a 13 inch and a 155/80/13 taller tire would it give me an improvement over fuel mileage as well as comfort?
Buy a less shitty car
@@TheTranfan hahah
speedometer showing wrong numbers when changing rim size?
Yes. But the difference is no rapid.
Smaller rims but high tire profile vs Wider rims with low tire profile, what is the difference if they have the same wheel circumference?
I read that the wider the tire, the more air resistance it creates as well as rolling resistance as the contact patch is wider.. If the outer diameter is the same it will have little affect.
Same question that I had in my mind, will there be any difference between let’s say 15” and 17” wheels if they have same overall diameter because of the tires.
@@bienpao I may be wrong but I think this is assuming a smaller tire size in addition to the smaller wheel. It should probably be using the term "overall tire diameter". Someone correct me if I'm understanding this incorrectly.
Man is smaller wheels faster or not?
We would get more acceleration and our car would be lowered too? Wow thats two birds with one stone. Seems too good to be true just for buying smaller diameter tires! No wonder they dont advertise that to us.
you explaination and the given example is whack. Yes bigger is bad for acceleration, but the example at the end with the Golf was slower due to friction increase because there are no 19 inch tires with 195mm width. If your 19" wheel with the tire on has the same circumfrence as the 15" with tire on, the only 2 factors affecting acceleration are rotational mass and friction.
So just to confirm, if I run say 18s instead of say 20s on my car, the 18s will do better for the 0-100 acceleration than the 18s? But vice versa for maybe 100-200?
AffectS
This video got a lot wrong and doesn't take a lot into consideration. A 17 inch wheel with a high profile tire will out perform any 15 inch wheel with a low profile tire. There is a lot that factors into this logic with racing. Plus what type of racing? A lighter wheel, higher profile tire will out perform in a straight line. This video is definitely made by someone who likes European cars and doesn't race. 15-18 inch wheels with a high profile tire for drag, or 19s with a low profile tire for track. 20s are garbage. Again it all depends on factors. Are we talking street cars, drag cars, F1, promods, top fuel?
More acceleration but lost top speed
So you need to downsize at least 3 inches for a 0.3 sec improvement from 0-60? That's not really nice. Might as well just pick lighter tires and rims isn't it
The Range is opposite!
Trade off to smaller tires is it will take you longer to get to speeds over 75mph to top speed of your vehicle. 0-75mph is a blast, 75mph and up is a snail. This is from my own experience.
XD nope..smaller with slow car with maximum 200 horsepower its maximum 15" 205/50 its soo much better than 17/18 205/205/35.
Yes. R19 vs R16 is different but. Most important is weight. If you have R18 with 16kg and R17 with 19kg car with R18 run faster and acceleration better. Different spin on 1km R17/R18 is 6 turn. 482/488 per 1km. And 8 turn on 1km don’t matter..
You may want to say tire diameter because wheel size is irrelevant in this case.
Wheel size can work the other way around = being more advantageous as they increase in diameter if only torque / force could be applied ... a little more ingenious ;)
Bigger tire gives you little more top end