The GPM SCX3021X brass front knuckle arms provide targeted mass at the wheel ends for AXIAL Racing CAPRA 1.9 UNLIMITED setups, improving low speed control and contact consistency on technical courses.
Adding approximately 115 grams per wheel alters rotational inertia and lowers the centre of gravity at the hub, which stabilises articulation and improves tyre engagement on irregular surfaces. These parts are intended as an effective weight upgrade to refine crawl behaviour without changing core suspension geometry.