Tyre Size Calculator
Enter your existing wheel and tyre specification in 'Existing Setup' then enter the specification of your potentially new wheels and tyres to see what a difference it will make!
This tool is great for working out if your new wheels will give you more or less clearance to your suspension and wheel arches. If you have any questions or need help using it please do get in touch and we'll be happy to help you with it.
- Tyre diagram
The image to the left shows your 'Existing' wheel and tyre (grey + black) with the 'New Setup' (green + black) overlaid.
This is a graphical representation of how your chosen change in wheel and tyre will affect your stance, poke and clearance.
To see the wheel to tyre ratio changes, and the Existing vs New tyres in profile select 'Tyre Image'.
For the measurements, take a look in the 'Data Table' tab.
- Tyre image
- Data table
Existing New Tyre Diameter 631.9mm 625.3mm Tyre Circumference 1985.2mm 1964.4mm Additional Poke N/A Inboard Clearance N/A Gearing Change N/A 1.01% Speedo at 30mph 30mph Speedo at 60mph 60mph Ride Height Change N/A Arch Gap Change N/A
Grid Extreme 20x8.5 6x139 ET25 Flat Black 2Excl. VAT: £177.08 Incl. VAT: £212.50
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