This JConcepts Silent Speed spur gear is a 48 pitch, 75 tooth replacement designed for the Associated RC10B7 platform. The gear features a vented spider-arm construction that reduces weight while maintaining rigidity. Silent Speed gearing is engineered to run quietly compared to standard spur gears, making it a popular choice for pit and indoor track environments. Features: 48 pitch, 75 tooth Silent Speed low-noise design Vented spider-arm construction for reduced weight Factory replacement for the Associated RC10B7 platform 7/7/26 cs