Insert your existing alloy wheel and tyre specs, and the desired size. 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
727.2mm
744.3mm
Circumference
2284.6mm
2338.3mm
Poke
71.3mm
90.7mm
Inset
119.3mm
150.7mm
Speedo error
0%
-2.3%
Reading at 30mph
30mph
29.31mph
Reading at 60mph
60mph
58.62mph
Ride height gain
0mm
8.55mm
Arch gap loss
0mm
8.55mm
Wheel Fitment Guide

Compared to your existing wheel, this new wheel will have an inner rim which is 31.4mm closer to the suspension strut. The outer rim will poke out 19.4mm more than before.

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.


Will They Fit - The No.1 Online Alloy Wheel & Tyre Fitment Calculator

Use our comprehensive online wheel size calculator to visualise different alloy wheels and tyre combinations. Calculate your offset, compare tyre stretch, rolling radius and more. Compare your new and existing setup and our tool will show you key measurements for accurate wheel and tyre fitment.