Geelong Rally Cross (GRX) is all about big slides, big air, and big fun!

This action-packed class rewards both speed and form, with drivers battling for heat wins while chasing maximum style points. Running 540 motors, rally block tyres, and an elevated ride height, GRX cars drift, jump, and scramble their way around the asphalt circuit, tackling jumps and obstacles along the way!
 

Chassis

• Any moulded plastic or Fibre-reinforced Plastic (FRP) 4WD or 2WD rally chassis*.​​

• Any available hop-ups for the chassis are permitted except full carbon chassis replacements.

• Carbon chassis cars are NOT permitted.​​

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Suitable chassis include:

• Tamiya TT-02 with rally hop-ups

• Tamiya XV-01 & XV-02 Variants

• XPRESS AT1 Sport Rally

• Kyosho Fazer Mk.2 with FZ-02-RCV Rally Conversion Kit

 

Motor & ESC

• Tamiya RS-540 Torque-Tuned Motor (part number #54358)

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

• Tamiya TBLE-02S, Hobbywing Quicrun 1060 60A or similar ESC.

• Steering Servo, Transmitter & Receiver are free.

• No Gyros or Electronic Driver Aids are permitted!

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Body Shell

GRX is for scale-accurate rally cars.

Many suitable Tamiya bodies are available as re-releases each year. Other rally bodies from manufactures like L&L, Colt and HPI are available online or through hobby retailers. This is a fun category so we encourage scale accuracy of bodies and paintwork!

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Suitable bodies include;

• Group 1 & 2 Rally Cars (Lancia Stratos, Audi Quattro, Porsche 911S)

• Group B Rally Cars (Audi Quattro S1, Ford RS200, Porsche 959, Lancia Delta S4, Peugeot 205 T16)

• Group A Rally Cars (Ford Escort RS, Impreza WRX, Lancer EVO 1-7, Lancia Delta HF, Toyota Celica GT4)

• WRC Cars (Impreza WRC 97-08, Lancer WRC, VW Polo WRC, Citroen Xsara WRC, Peugeot 206 WRC)

• WRC+ Cars (Hyundai i20 WRC, Toyota GR Yaris WRC, Ford Puma WRC)​

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Body Rules

• Bodies should be scale-accurate representations of actual cars that rallied in period.

• ISTC Touring Car, LMP, Sportscar and Can-Am bodies are NOT permitted

• Spoilers and wings should appear as used on the actual car.

• No additional skirts, raised/extended wings or air-controlled surfaces are permitted.

• Body must be trimmed to trim lines.

 

Tyres

• 1/10 Chassis - Max 70mm⌀ Tamiya Rally Block tyres or similar

• M-Chassis - Max 60mm⌀ Tamiya Rally Block tyres or similar

• Tyre cleaner permitted.

• Tyre warmers and additive are NOT permitted.

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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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Weight & Dimensions

• Minimum weight RTR is 1450g

• Maximum wheel track is 200mm

• The chassis must have a minimum ride height of 15mm RTR.

 

Gearing

To achieve consistent roll out* across all cars we have set a minimum Final Drive Ratio (FDR) of;

• 6.50 for 1/10 cars on 70mm tyres.

• 5.80 for M-chassis cars on 60mm tyres.

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This table indicates how to achieve an FDR close to these minimums with popular rally chassis;​​