Hot Racing Steel Helical Underdrive Differential Ring/Pinion for Traxxas TRX-4 (35T/10T) Traxxas Sledge Other features include a plastic

Other features include a plastic case with an aluminum center band for heat dissipation

improved power delivery

The Estes D12-5 engine is a single stage engine designed for model rocket flight

Boasting reinforced components from heavy-duty suspension arms to steel wheel hubs

2V-7700mAh-120C pack

Hot Racing Steel Helical Underdrive Differential Ring/Pinion for Traxxas TRX-4 (35T/10T) Traxxas Sledge Other features include a plasticThe Hot Racing Traxxas TRX 4 Steel Helical Underdrive Differential Ring Pinion Gear is a spiral cut overdrive 35T 10T gear set option for the Traxxas TRX 4. Features: Provides greater strength than factory straight cut gears Made from high carbon steel Less vibration than stock TRX 4 gears Provides 9% overdrive when compared to the stock (34T 11T) gearing Works front or rear Includes: (1) 35T Spiral Cut Ring Gear (1) 10T Spiral Cut Pinion Gear