The Alloy Wheel Fitment, Tyre Stretch, Rolling Radius & Speedo Error Calculator
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Your Results
Existing
New
Diameter
634.3mm
634.3mm
Circumference
1992.7mm
1992.7mm
Poke
79.3mm
119.3mm
Inset
149.3mm
109.3mm
Speedo error
0%
0%
Reading at 30mph
30mph
30mph
Reading at 60mph
60mph
60mph
Ride height gain
0mm
0mm
Arch gap loss
0mm
0mm
Compared to your existing wheel, this new wheel will have an inner rim which is
40mm further away from the suspension strut.
The outer rim will poke out
40mm 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.