Shimano XT RD-M8100 Rear Derailleur Inner Plate

This specific inner plate is designed exclusively for the GS (mid-cage) version of the Shimano XT RD-M8100 rear derailleur. It will not fit the SGS (long-cage) model, so please verify your derailleur cage length before purchasing.

No, this is strictly the inner cage plate itself. You will need to reuse your existing pulley wheels, bolts, and outer cage plate during the installation.

Replacing the inner plate is a cost-effective way to repair a derailleur that has suffered minor damage, such as a bent cage from a trail strike. If the main derailleur body and parallelogram are still functioning correctly, swapping the plate is a straightforward fix that restores proper chain tension and shifting performance.

You will generally need a standard set of hex keys (Allen wrenches) to remove the pulley bolts and the cage assembly. While the process is straightforward, having a chain tool to remove the chain first makes the job much easier.

Yes, this is a genuine Shimano factory replacement part. It is constructed from the same durable aluminum as the original component, ensuring it meets the exact specifications and strength requirements of your XT drivetrain.