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
625.3mm
627.8mm
Circumference
1964.4mm
1972.3mm
Poke
28.9mm
81.3mm
Inset
148.9mm
147.3mm
Speedo error
0%
-0.4%
Reading at 30mph
30mph
29.88mph
Reading at 60mph
60mph
59.76mph
Ride height gain
0mm
1.25mm
Arch gap loss
0mm
1.25mm
Wheel Fitment Guide

Compared to your existing wheel, this new wheel will have an inner rim which is 1.6mm further away from the suspension strut. The outer rim will poke out 52.4mm 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.