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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2 Item(s)

  1. MXR 18x11 5x114 ET8 White with Polished Lip
    Excl. VAT: £250.00 Incl. VAT: £300.00
    MXR,18,11,5114,ET8,White with Polished Lip Learn More
  2. RB 15x8 4x100 ET30 White with Polished Lip
    Excl. VAT: £141.67 Incl. VAT: £170.00
    Hugely popular on: Mazda MX5 Mk1 (NA / Eunos Roadster) Mazda MX5 Mk2 (NB / Eunos Roadster) Mazda MX5 Mk2.5 (NB / Eunos Roadster) Learn More

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2 Item(s)