The Alloy Wheel Fitment, Tyre Stretch, Rolling Radius & Speedo Error Calculator
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Your Results
Existing
New
Diameter
595.8mm
576mm
Circumference
1871.8mm
1809.6mm
Poke
0mm
0mm
Inset
0mm
0mm
Speedo error
0%
3.44%
Reading at 30mph
30mph
31.03mph
Reading at 60mph
60mph
62.06mph
Ride height gain
0mm
-9.9mm
Arch gap loss
0mm
-9.9mm
Compared to your existing wheel, this new wheel will have an inner rim which is
the same distance from the suspension strut as your current wheel.
The outer rim will poke out
the same as 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.