ETM RTR Sport 55-Tooth 420 Chain Rear Sprocket
Keep your ETM RTR Sport running at peak performance with this precision-cut 55-tooth rear sprocket. Designed as a direct OEM-spec replacement for the 420 chain drivetrain, this sprocket delivers consistent power transfer and reliable engagement lap after lap — or mile after mile.
Key Features
- 55-tooth rear sprocket for optimized low-end torque and acceleration
- Compatible with 420 chain pitch — direct fit for ETM RTR Sport
- Precision-machined for accurate chain alignment and reduced wear
- Lightweight construction at 0.8 lb for minimal unsprung weight
- OEM-spec replacement — no modifications required
Specifications
- Tooth Count: 55T
- Chain Pitch: 420
- Weight: 0.8 lb
- Compatible Model: ETM RTR Sport
- Vendor: Electro & Co
Whether you’re replacing a worn sprocket or dialing in your gearing, this is the part that keeps your RTR Sport moving the way it was built to.




