Shimano XTR RD-M985 Rear Derailleur

No, this specific stabilizer unit is designed exclusively for the Shimano RD-M985 and RD-M986 series rear derailleurs. It fits both the GS (mid-cage) and SGS (long-cage) versions of these specific models.

If you notice increased chain slap, excessive noise over rough terrain, or if the clutch switch feels loose or fails to engage properly, your stabilizer unit is likely worn out. Replacing the internal mechanism is a cost-effective way to restore that original, crisp shifting performance.

Yes, this package comes with the essential stabilizer unit, the P-Axle washer, and the switch stabilizer. It provides the core components required to rebuild the clutch mechanism without needing to replace the entire derailleur assembly.

It is a manageable task if you have basic mechanical aptitude and the correct tools for your specific derailleur model. However, because it involves the internal clutch mechanism, take your time during disassembly to ensure all small parts are reinstalled in the correct order.

This kit specifically addresses the stabilizer and chain tension management, which helps with chain slap and dropped chains. If your shifting issues are related to cable tension, bent derailleur hangers, or worn jockey wheels, this kit will not resolve those problems.