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. Spec8 15x7 4x100 ET35 Steelgrey
    Excl. VAT: £137.50 Incl. VAT: £165.00
    A hugely popular wheel for the following vehicles: Honda Civic Mazda MX5 Mitsubishi Colt Seat Arosa Seat Ibiza (4 stud) Suzuki Swift Toyota Starlet Toyota Yaris Vauxhall Corsa (4 stud) Volkswagen Lupo Volkswagen Golf Mk1 / Mk2 Volkswagen Polo (4 stud) Lower offset wheels may require some arch work to avoid the tyres rubbing. Learn More
  2. Spec8 15x7 4x100 ET35 Gunmetal
    Excl. VAT: £133.33 Incl. VAT: £160.00
    A hugely popular wheel for the following vehicles: Honda Civic Mazda MX5 Mitsubishi Colt Seat Arosa Seat Ibiza (4 stud) Suzuki Swift Toyota Starlet Toyota Yaris Vauxhall Corsa (4 stud) Volkswagen Lupo Volkswagen Golf Mk1 / Mk2 Volkswagen Polo (4 stud) Lower offset wheels may require some arch work to avoid the tyres rubbing. Learn More
  3. Spec8 15x7 4x100 ET35 Gold
    Excl. VAT: £137.50 Incl. VAT: £165.00
    A hugely popular wheel for the following vehicles: Honda Civic Mazda MX5 Mitsubishi Colt Seat Arosa Seat Ibiza (4 stud) Suzuki Swift Toyota Starlet Toyota Yaris Vauxhall Corsa (4 stud) Volkswagen Lupo Volkswagen Golf Mk1 / Mk2 Volkswagen Polo (4 stud) Lower offset wheels may require some arch work to avoid the tyres rubbing. Learn More
  4. Slipstream 18x9.5 5x120 ET40 Gunmetal
    Excl. VAT: £229.17 Incl. VAT: £275.00
    Slipstream,18,9.5,5120,ET40,Gunmetal The Slipstream has always been a classic, now brought bang up to date in 18" Sizing. Just 9.6kg in the specs listed, the ET40 Slipstream is ideally suited to Honda Civic FK2 / FK8 owners looking for a wider 18" setup. Learn More
  5. Slipstream 18x9.5 5x120 ET40 Flat Black 2
    Excl. VAT: £229.17 Incl. VAT: £275.00
    Slipstream,18,9.5,5120,ET40,Flat Black 2 The Slipstream has always been a classic, now brought bang up to date in 18" Sizing. Just 9.6kg in the specs listed, the ET40 Slipstream is ideally suited to Honda Civic FK2 / FK8 owners looking for a wider 18" setup. Learn More
  6. Slipstream 18x8.5 5x114 ET30 Silver
    Excl. VAT: £212.50 Incl. VAT: £255.00
    Slipstream 18x8.5 5x114 ET30 Silver Learn More
  7. Slipstream 18x8.5 5x114 ET30 Flat Black 2
    Excl. VAT: £212.50 Incl. VAT: £255.00
    Slipstream 18x8.5 5x114 ET30 Flat Black 2 Learn More
  8. Slipstream 18x8.5 5x100 ET35 Silver
    Excl. VAT: £212.50 Incl. VAT: £255.00
    The perfect fitting wheel for: Audi A3 (Spacers may be needed) Skoda Octavia (Spacers may be needed) Subaru BRZ Subaru Impreza Toyota GT86 VW Golf MKIV (Spacers may be needed) Learn More
  9. Slipstream 16x7 4x100 ET40 Silver
    Excl. VAT: £139.17 Incl. VAT: £167.00
    Slipstream 16x7 4x100 ET40 Silver Learn More
  10. Slipstream 15x6.5 4x95.25 ET7 Flat Black - Lotus Elise S1 (front wheel)
    Excl. VAT: £125.00 Incl. VAT: £150.00
    Slipstream 15x6.5 4x95.25 ET7 Flat Black Specified perfectly for the front of a Lotus Elise S1, with the correct 4x95.25 PCD and 56.7mm centre bore. These can be paired with our 16x8.0, ET12 rear wheels to provide a full set in the perfect dimensions. Designed to accept the original Lotus Centre caps. Learn More

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