This JConcepts Silent Speed spur gear is designed for the Associated RC10B7 platform and features a 48 pitch, 78 tooth specification. The Silent Speed design incorporates a flex-disc style construction intended to dampen driveline noise and smooth power transfer. It is a direct replacement spur gear sized to fit the B7 gear mesh and drivetrain layout. Features: 48 pitch, 78 tooth Silent Speed flex-disc dampening construction Designed for the Associated RC10B7 platform Factory replacement spur gear 7/7/26 cs