tire diameter

[bokhalid777]

Hi Guys

I am a new member, and I am really happy to join you guys. I am trying to prove that if we change the tire diameter to a bigger one we will accelerate faster than the default one. Please guys if you have some formula, equation, or statistics to prove that, I will appreciate it.

I hope to hear from you soon

Best regards;

Bokhalid777

 

[Fabrico]

That should only happen if the default tire is lacking in traction. If neither one slips, and all else is equal, the bigger diameter tire should accelerate slightly slower. The only other thing that might make a difference is if the gearing is way off.

 

[NormPeterson]

There will be small speed ranges between the shift points for the two tire sizes. In all likelihood, you'll get somewhat better acceleration with the tall tire still in the lower gear than you would with the shorter tires in the next higher gear. Pick your comparative "races from a roll" very carefully, and keep them very short.


Norm

 

[evelrod]

We can compare larger and smaller diameter tires for just about any performance criteria.....BUT....how do we maintain this idea of "all things, aside diameter, being equal"? I suppose anything is possible...the thought of setting up a 'proper' scientific experiment boggles the mind.

Rod

 

[bokhalid777]

Thanks you all for your awesome responded; I would like to clear my idea. What I am trying to do is to change the tire diameter from 16 inch to 22 inch. I think it will give me more speed than before. However I need equation to prove it before I go a head and waste my money.
Best regards;
Bokhalid777

 

[TheBlacksmith]

You need to consider the tire diameter, actually radius, not just the wheel diameter.

Standing tire radius x RPM /final drive ratio x 168 = MPH

This is good until you run out of horsepower and since horsepower is a product of torque and RPM, a larger tire may lower your rpm and horsepower enough to actually be slower.

 

[CapriRacer]

Bokhalid777,

You may want to try finding a "Tire Calculator". I like the one at:

http://www.1010tires.com

The problem with most tire calculators is that the rolling diameter of a tire is 3% smaller than the physical diameter, however, the one at 1010tires takes this into account.