Description
A sprocket does not need to be broken to be holding a bike back, since even mild wear changes how cleanly the chain engages under power. ProTaper built its Race Spec (RS) rear sprockets around a CNC-machined Angled Mud Groove that channels debris away from the tooth roots as the wheel spins, instead of letting it pack in and wear a groove into the chain. This black 37-tooth rear sprocket is machined for Honda off-road models, and the groove layout also opens up roughly 40 percent more tooth surface area than a standard flat-plate design, so the chain rides on more material with every link that engages.
What makes this sprocket worth the swap:
- Angled Mud Groove design self-cleans during operation, shedding packed mud and dirt instead of trapping it against the chain
- CNC-machined tooth profile increases contact surface area versus flat competitor designs, which spreads load and slows wear
- Countersunk bolt holes self-center the sprocket onto the hub during installation, so no separate hub center guide tool is needed
- 37-tooth count for Honda off-road models, sold individually and ready to bolt on with stock hardware
- The black hardcoat finish keeps a clean, factory-style look on the bike and hides scuffs from chain slap better than bright colors do over a full season of riding.
Dropping to a 37T rear stretches out final gearing for more top-end pull, the kind of setup riders lean on for wide-open desert racing, GNCC transitions, or highway-adjacent dual-sport miles where you want less shift-happy RPM at speed. Keep the chain properly lubed and tensioned after installation, since even the best sprocket wears faster on a neglected chain.
