distance of travel?

Question

how many turns would there be in 1 mile of a 20 inch wheel.and how many turns would there be with a 21 inch wheel,

Answer 1

Well are you including the tire with the wheel size? not just the rim correct? Either way I'll answer your answer and show you how you can come by that answer.

First you take the diameter 20 inchs and multiply that by pie(3.14) which gives you the circumference of 62.8inches. Next you divide 62.8 by 12 to give you the circumference in feet which would be 5.23ft(rounded). Then you have to take the number of feet in a mile which is 5280 and divide that by 5.23 which would give you your answer of 1009.6 rotations per mile for a 20 inch wheel.

Doing the same equation for a 21 inch wheel your answer would be 960.9 rotations per mile.

Answer 2

It depends on what size of tyre you have fitted, as it is the tyre that touches the road, not the wheel.

If you are changing the wheels on your car, you should be choosing a suitable tyre such that the effective rolling radius of the tyre does not change. Hence if your increase the wheel diameter, you reduce the tyre profile to compensate. If this is done correctly, the number of turns the wheel makes per mile should be the same on both the original and new wheels.

If you do increase the effective rolling diameter of the tyre, such that the number of turns of the wheel per mile changes, you will have to have your speedometer recalibrated. Also you will have changed the overall gearing of the car, so performance, fuel consumption and emissions will be affected.

Answer 3

well you need to work out what the circumference is of the wheels and work out how many inches there are in a mile then divide the two

Answer 4

tirerack.com has a convertor tool for that on there web site