SCX-6 brass heavy steering knuckle (gold color with brake rotor & caliper set) (total 559g)If you're looking to take your SCX 6 crawler to the next level, the SCX 6 brass heavy knuckle full set with scale brake rotor & caliper set is a must have upgrade. This set is designed to add bottom weight to your crawler, which improves stability, lowers the CG, and boosts climbing performance. The heavy duty 8x19x6mm outer bearing included in the set also increases longevity and adds weight for even better performance. The knuckles are made from