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
652.4mm
652.4mm
Circumference
2049.6mm
2049.6mm
Poke
32.6mm
37.6mm
Inset
132.6mm
127.6mm
Speedo error
0%
0%
Reading at 30mph
30mph
30mph
Reading at 60mph
60mph
60mph
Ride height gain
0mm
0mm
Arch gap loss
0mm
0mm
Wheel Fitment Guide

Compared to your existing wheel, this new wheel will have an inner rim which is 5mm further away from the suspension strut. The outer rim will poke out 5mm 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.