The GPM TRX4021BX brass front knuckle arms are compatible with Traxxas TRX-4 models such as the Defender, Tactical Unit and Ford Bronco. Engineered for a positive fit and smooth articulation, these brass parts help stabilise the front end and sharpen steering response. Serving as external ballast, each knuckle weighs 50g and aids tyre traction on wet, loose or technical terrain.
Part location: Inner case of the front knuckle
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