1/12th Modified


 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. Modelers may build their own chassis following the rules in the “Appendix - Custom Chassis” 


 Any motor on the approved ROAR list.


Any 1s ESC on the approved ROAR list.

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

N.B. a voltage booster or separate 6.6v LiFe receiver pack will be required to provide consistent power to the servo and receiver.

Body Shell

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.


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 

Hop Ups

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


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.


Any gearing is allowed. 


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


Overall Min Width: 155mm

Overall Max Width: 176mm

Max Track Width: 172mm

Overall Min Length: 320mm

Overall Max Length: 380mm