Mark Seymour - Reference and Resources

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Ginetta G40 Wheels, Tyres & Brakes

The GRDC car uses 17" wheels manufactured by Rimstock / Team Dynamics exclusively for Ginetta. For the race series, the regulation tyres are Michelin Pilot Sport 3.

  • Rim size: 17" x 7.5"
  • Tyre size: 205/40 17

These tryes last at least one season of track days and racing, probably two seasons. Compared to performance cars like the Porsche 911 when used on track, this is remarkable value for money and a good reason for buying a G40 if you like to go on track. A 911, for example, at 1600 kilos and 350 BHP, will probably use a £900 set of tyres in three track days.


Brake discs / rotors are 280x25mm all round. Front brake calipers are four pot, rear brake calipers are two pot, both manufactured by Hi Spec Motorsport of Dartford exclusively for Ginetta. The handbrake works on the rear discs with a separate, cable-operated caliper.

The recommended brake fluid is Sunoco R600+. Rear brake bleed screws tend to sieze up, so be aware of over-tightening, and check regularly.

There is no anti-lock braking system on the G40.