Welcome to Rota Wheels UK - the home of Rota Wheels in Europe

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.

Existing setup

New setup

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
ExistingNew
Tyre Diameter631.9mm625.3mm
Tyre Circumference1985.2mm1964.4mm
Additional PokeN/A
Inboard ClearanceN/A
Gearing ChangeN/A1.01%
Speedo at 30mph30mph
Speedo at 60mph60mph
Ride Height ChangeN/A
Arch Gap ChangeN/A

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  1. GKR 18x9.5 5x114 ET45 Gunmetal
    Excl. VAT: £229.17 Incl. VAT: £275.00
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  2. Grid 18x9.5 5x114 ET20 Matte Bronze 3
    Excl. VAT: £229.17 Incl. VAT: £275.00
    Grid,18,9.5,5114,ET20,Matte Bronze 3 Learn More
  3. Grid 18x9.5 5x114 ET20 Red
    Excl. VAT: £229.17 Incl. VAT: £275.00
    Grid,18,9.5,5114,ET20,Red Learn More
  4. Grid 18x9.5 5x114 ET30 Gunmetal
    Excl. VAT: £229.17 Incl. VAT: £275.00
    Grid 18x9.5 5x114 ET30 Gunmetal Learn More
  5. Grid 18x9.5 5x114 ET30 Matte Bronze 3
    Excl. VAT: £229.17 Incl. VAT: £275.00
    Grid 18x9.5 5x114 ET30 Matte Bronze 3 Learn More
  6. Grid 18x9.5 5x114 ET38 Matte Bronze 3
    Excl. VAT: £229.17 Incl. VAT: £275.00
    Grid 18x9.5 5x114 ET38 Matte Bronze 3 Learn More
  7. Grid 19x9.5 5x114 ET20 Matt Bronze 3
    Excl. VAT: £245.83 Incl. VAT: £295.00
    Grid,19,9.5,5114,ET20,Matt Bronze 3 Learn More
  8. Grid FF 18x9.5 5x114 ET40 Gunmetal
    Excl. VAT: £249.99 Incl. VAT: £299.99
    The Latest in the evolution of the Rota Grid, the Grid FF utilises the latest in Flow Forged Technology, resulting in impressive weight savings. Just 9.0kg in the specs listed. Learn More
  9. GTR 17x9.5 5x114 ET30 Gunmetal
    Excl. VAT: £175.00 Incl. VAT: £210.00
    GTR,17,9.5,5114,ET30,Gunmetal Learn More
  10. GTR 18x9.5 5x114 ET12 Gunmetal
    Excl. VAT: £229.17 Incl. VAT: £275.00
    GTR,18,9.5,5114,ET12,Gunmetal Learn More

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