- #1

- 168

- 7

If I put wheels that are 24 in diameter, so 4% smaller, what exactly will change ? Will I have 4% more torque ?

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

In summary, changing the wheel size of a car from 25 inches to 24 inches will not affect the amount of torque at the wheel. However, there will be changes at the contact patch and the RPM of the car. The formula for torque is F=T/r, and the circumference of the wheel will also change. When considering changing tire dimensions, assume it is constant and the tractive force will increase. The tractive effort is calculated by dividing torque by the tire radius. With a constant torque of 100 Nm, the tractive effort will increase from 314N to 328.08N when using a 24-inch diameter tire, which can aid in climbing gradients.

- #1

- 168

- 7

If I put wheels that are 24 in diameter, so 4% smaller, what exactly will change ? Will I have 4% more torque ?

Engineering news on Phys.org

- #2

- 2,056

- 85

You'll have exactly the same amount of torque. Something will change at the contact patch through.

- #3

- 168

- 7

- #4

- 168

- 7

Ohhh...its F=T/r ... I get it now.

- #5

- 29

- 1

If F is the ground force on the wheel then T- F.r = I_{G}.α

- #6

- 26

- 0

Also your rpm changes. The circumference (pi*D) is less on the smaller diameter.

- #7

- 11

- 0

So when you are considering change in tyre dimensions assume it constant. so for changing wheel selection following things will occur.

in this case your tractive force will increase..

tractive effort= Torque/tyre radius (dynamic rolling radius)

say you have 100Nm of torque which is constant

now you used 25inch tyre= radius=0.3175m

so tractive effort = 100/.3175=314N

Now you used 24inch dia tyre=radius=.3048m

so tractive effort = 328.08N

so basically your tractive effort increases which can help you to climb gradients..

you can calculate percentages.

Share:

- Replies
- 10

- Views
- 811

- Replies
- 5

- Views
- 476

- Replies
- 4

- Views
- 708

- Replies
- 1

- Views
- 93

Automotive
Wheel + Trans diff + Torsion bar?

- Replies
- 3

- Views
- 663

- Replies
- 2

- Views
- 363

- Replies
- 19

- Views
- 1K

- Replies
- 3

- Views
- 2K

- Replies
- 26

- Views
- 1K

- Replies
- 3

- Views
- 157