SCX-6 brass heavy steering knuckle (Black color with brake rotor & caliper set)The SCX6 4412BK FS is a full set of SCX 6 brass heavy knuckles that include a scale brake rotor and caliper set. These heavy knuckles add bottom weight, totaling to 547g, which can improve climb performance, provide greater stability, and lower the center of gravity. The set includes heavy duty 8x19x6mm outer bearings, ensuring long lasting durability. They are made from high quality CNC machined solid brass material and feature the SAMIX word and L R