Shimano RD-RX805-GS Bracket Axle Unit

No, this specific part (Y3FC98010) is engineered exclusively for the Shimano RD-RX805-GS rear derailleur. It is not designed to be cross-compatible with other derailleur models.

You should consider replacing it if you notice excessive play or wobbling in the derailleur body, or if the unit has sustained physical damage from a crash. If your shifting feels imprecise despite proper cable tension and limit screw adjustments, wear in this structural component is a likely culprit.

Yes, installing a bracket axle unit typically requires a set of hex wrenches and potentially a snap-ring plier or specific Shimano service tools depending on your derailleur's exact configuration. We recommend consulting the official Shimano dealer's manual for your specific derailleur model to ensure you have the correct tools before starting.

This item is the bracket axle unit itself. While it includes the core structural piece, it does not typically include additional mounting bolts or small hardware unless specified by the manufacturer's parts diagram. It is best to retain your existing hardware or check the exploded view diagram for your derailleur to see if you need additional small parts.

No, this part will not correct a bent derailleur hanger. If your hanger is misaligned, the derailleur will not sit parallel to the cassette regardless of the condition of the bracket axle unit. Always check your hanger alignment first if you are experiencing persistent shifting problems.