Will They Fit

The Wheel Fitment, Tyre Stretch, Rolling Radius and Speedometer Error Calculator

Insert your existing wheel and tyre specs, and the desired size, and the outcome is shown on the diagram.

Your existing setup

Existing Tyre
Existing Wheel

Your new setup

New Tyre
New Wheel
Your Results

Existing

New

Diameter
645.2mm
649.7mm
Circumference
2027mm
2041.1mm
Poke
86.3mm
98.4mm
Inset
142.3mm
168.4mm
Speedo error
0%
-0.69%
Reading at 30mph
30mph
29.79mph
Reading at 60mph
60mph
59.58mph
Ride height gain
0mm
2.25mm
Arch gap loss
0mm
2.25mm

Compared to your existing wheel, this new wheel will have an inner rim which is 26.1mm closer to the suspension strut. The outer rim will poke out 12.1mm more than before.

Wheel Fitment Guide

The strut shown in the diagram is for show only. Don't worry if the wheel looks like it fouls!

Bear in mind most tyre manufacturers vary slighty from the specs, and that it could be dangerous to run tyres on wheels they aren't designed to fit.

Part of the Family
Suitable wheels from Driftworks
18" WheelsWheels with a 10.5" width