FWB/RWB Chassis for RC8B4e (ASC81644)

This adjustable FWB/RWB chassis for the RC8B4e lets racers tune weight bias by moving the motor and center differential between forward and rearward positions with a dedicated adapter, giving you precise control over how the car behaves on track.

Forward bias delivers sharper steering while rearward bias adds rear grip and lightens the front on low-traction or bumpy surfaces. The drivetrain is installed in reverse orientation compared with the original kit to produce a positive torque reaction that improves traction under power. Updating an existing RC8B4e to this system requires the update kit, and instructions are included. The setup uses the original 104mm center dogbone, with a 96.5mm center dogbone set available separately for spare parts.