​​Chassis

Any Four-wheel drive, 190mm touring chassis with independent suspension on all four wheels.
Each driven wheel must have a flexible joint, eg: dog bone/s or universal joint/s in its drive shaft.

• Drive train and suspension design is free from restriction.

• Flat Pan (1/12th and 1/10th Track Style) chassis are not allowed.

• The Chassis must not be shaped to gain an aerodynamic advantage In principle the underside of the chassis must be flat and parallel to the ground along the entire length of the body-shell.

• Aerodynamic shaped parts (splitters / diffuses /tunnels/etc)are NOT be fitted to the chassis

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Motor & Electronics

• Any BRCA and ROAR approved 17.5T, fixed timing and adjustable timed motors are allowed.

• The motor should be run out of the box with No Modifications

• Any ESC without dynamic timing, or with a Blinky mode, is allowed.

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Body Shell

• 2 Door LMH (Hypercar), GT1, GT2, GT3 & GT4 190mm bodies of actual GT cars ONLY

• No Additional Aero packages are allowed.

• No Pre 2021 Group C, Can-Am, LeMans LMP1/LMP2 style bodies.

• Eligibility of new shells will be at the discretion of the rules committee.

• At specific events GRCR may limit the body rules to either LMH OR GT

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Tyres

• 24mm Rubber tyres.​

• Tyre cleaner permitted.

• Tyre warmers permitted.

• Tyre additive permitted.

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Hop Ups

• Any hop up available from any manufacturer.

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Batteries

• Any 2 cell Hard-cased approved 7.4 Lipo packs as listed on the ROAR or EFRA websites.

• Please see GRCR battery rules.

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Gearing

• Gearing is not restricted.

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Weight

• Minimum 1320g ready to run including transponder.

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