4X4 TYRE SIZE CALCULATOR

Original Tyre
0 tyres found in our database View these tyres
Original Wheel
Original Wheel
Rim Diameter: mm   ( inches)
Sidewall Depth: mm   ( inches)
Total Diameter: mm   ( inches)
Rolling Circumference*: mm   ( inches)
New Tyre
0 tyres found in our database View these tyres
New Wheel
New Wheel
Rim Diameter: mm   ( inches)
Sidewall Depth: mm   ( inches)
Total Diameter: mm   ( inches)
Rolling Circumference*: mm   ( inches)
     

Changing your wheels/tyres may effect your speedometer reading!

With this new combination your speed will be % of that inidicated.

When your speedo reads mph you will actually be doing mph

Points to note:
1 inch = 25.4mm (Tyre & wheel manufacturers mix mm and inches in their ratings)

Remember: A Speedometer error means an odometer error too!

* As tyres deform under load, a tyre does not roll like a solid wheel. It's Rolling circumference is calculated using a deformation factor (DF) x total diameter x pi. DF is typically 0.96 . If required, you can change the deformation factor here:

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