ETM RTR 420 Sprockets: Match Your Rear Sprocket to Your Wheel Size
Running supermoto wheels or the Big Wheel Set on your ETM RTR? These 420 rear sprockets are made to go with them. Choose the 63 tooth for 14in wheels or the 55 tooth for 12in wheels to keep your 420 drivetrain matched to your setup.
✅ BIKE FITMENT
- ETM RTR Sport
- ETM RTR XL
- ETM RTR Alpha
- ETM RTR Alpha XL
Features
- 420 pitch sprockets for the ETM RTR 420 drivetrain
- Made to pair with our supermoto wheel sets or the Big Wheel Set
- Two sizes: 63 tooth for 14in wheels, 55 tooth for 12in wheels
Note: Image may not match the exact sprocket.
420 63 Tooth (14in Wheels)
Best for: RTR riders running 14in wheels, such as the ETM RTR Big Wheel Set or the 14in Supermoto Wheel Set for RTR.
What's Included:
Not included: Chain, front sprocket, wheels
420 55 Tooth (12in Wheels)
Best for: RTR riders running 12in wheels, such as the 12in Mag Supermoto Wheel Set for ETM RTR.
What's Included:
Not included: Chain, front sprocket, wheels
Frequently Asked Questions
Which sprocket do I need?
Choose the 63 tooth for 14in wheels or the 55 tooth for 12in wheels.
Will this work on an RTR with #35 chain?
No. These are 420 sprockets. For #35 setups, see the ETM RTR #35 Replacement Rear Sprocket.
Do I need a new chain too?
If your chain is worn, replace it at the same time. The ETM RTR 420 Replacement Chain and Sprocket Kit includes a 63T rear, 8T front and chain.
Do you sell the front sprocket?
Yes. See the ETM RTR 420 8T Replacement Motor Sprocket.
Does the photo show the exact sprocket?
Not always. The image may not match the exact sprocket you receive.
