Spur Gear/Clutch Bell Combo, and is intended for use with the HPI Savage .25 truck. Robinson Racing's new spur and clutchbell are precision CNC-machined from solid steel and hardened for the ultimate ...

for long-lasting performance. Use them to adjust the final drive ratio for added tuning benefits. The out-of-the-box clutch bell gear is a 15-tooth for the Revo and Slayer. (requires 5x11x4mm ball bearings part #TRA4611) ...