The GPM TRX4021BX front knuckle arms are engineered for Traxxas TRX-4 platforms including Defender, Tactical Unit and Ford Bronco. Manufactured to tight tolerances, the brass construction provides stable pivoting and reliable fitment that reduces slop in the steering assembly. The added mass of each knuckle, 50g, shifts weight to the front axle to enhance tyre contact and traction under load.
Part location: Inner case of the front knuckle