This is an optional Traxxas Sledge Machined Ring Gear w/Pinion (Front/Rear).
Made for the most extreme action, spiral-cut 43-tooth ring and 10-tooth pinion differential gear sets are CNC-machined from a solid block of steel. The teeth are cut with a slight curve to minimize backlash between gears and maximize tooth traction with more surface area than straight-cut gears.
