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GRCR Racing Classes

1/12 Scale Stock & 1/12 Scale GT

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Chassis

Any commercially available 1/12 scale rear wheel drive pan car chassis with T-bar or Pivot Ball Link. Independent rear suspension is not allowed. 

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Motor

 Any motor on the approved ROAR list.

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ESC

Any ESC that does not have dynamic timing i.e. boost or turbo timing options; Or any ESC that has a Blinky mode i.e. a flashing light denotes that no dynamic timing is enabled, is allowed. A 1s specific ESCis recommended for Its plug and play application, a 2s ESC that meets the aforementioned requirements may be used.

 

A 1s specific ESC is recommended for its plug and play application, a 2s ROAR approved ESC that supports 1s application may be used.

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Body Shell - 1/12 Stock

Only LM-style body shells on the approved body list provided by IFMAR, EFRA, ROAR or BRCA may be used. Additional side dams may not be fitted. Only side dams moulded into the original body shell are allowed. Body shell may not be trimmed higher than the lower body trim lines - wheel arches must be cut out. No part of the chassis, wheels, tyres, suspension or electrical equipment may be visible outside the body shell when viewed in any plane, except for directly from the rear of the chassis. Rollover antenna may be fitted. If fitted, it must have a blunt end for safety reasons. The antenna must be part of the mast along its length. Maximum height from the ground: 350mm


Only one rear wing, moulded into the body shell, may be used. An additional gurney flap may be fitted, provided it does not exceed the height of the originally moulded rear wing. No holes or slots are allowed on the body or wing, except for body post, aerial and club rental transponder holes.

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Body Shell - 1/12 GT

Only GT-style body shells may be used. Body shell may not be trimmed higher than the lower body trim lines - wheel arches must be cut out. No part of the chassis, wheels, tyres, suspension or electrical equipment may be visible outside the body shell when viewed in any plane, except for directly from the rear of the chassis.


Only one rear wing, as supplied with the body may be used. No holes or slots are allowed on the body or wing, except for body post, aerial and club rental transponder holes.

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Tyres

  • Only 1/12 scale foam tyres may be used.

  • Pre-mounted or user glued tyres are allowed.

  • Wheel dimension must not be smaller than 29mm and must not exceed 38mm.

  • Maximum rear tyre width: 40mm

  • Maximum front tyre width: 28mm 

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Hop Ups

  • All hop-ups for 1/12 scale pan cars are allowed. 

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Batteries

  • Any ROAR approved 1s (one cell) Li-Poly hardcase battery is allowed. HV Graphene batteries are allowed however, maximum charged voltage must not exceed 4.22v.

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Gearing

  • Gearing is not restricted.

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Weight

  • Minimum race-ready weight: 730g (with transponder) 

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Dimensions

  • Overall Min Width: 155mm

  • Overall Max Width: 176mm

  • Max Track Width: 172mm

  • Overall Min Length: 320mm

  • Overall Max Length: 380mm

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Driving Aids

  • No electronic driving aids permitted
    (steering control by gyroscope, Drag Reduction System, wheel speed sensors, etc.).

  • Transmitter functions are allowed.   

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Ride Height

  • Minimum ride height allowed is 3mm at race ride height.

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Setup Sheets​

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