Samix SAMTRX4-4412C3 Samix Traxxas TRX-4 Brass Steering Knuckle, Portal Cover & Scale Brake Rotor Set

Brass knuckle adds 51g per side. Brass portal knuckle cover adds 55g a pair
NOTE: The brake rotor is suitable for the standard TRX-4 wheel, and will clear any wheel with greater than 36mm inner diameter but may require wider hubs.