RockShox Solo Air Spring Assembly

This assembly is specifically engineered for RockShox SID and Reba forks in the A2-A3 generation. Before purchasing, verify your fork's model year and chassis generation, as internal components are not cross-compatible across different RockShox lineups.

This specific assembly is set for 120mm of travel. While it is designed to restore performance, it is not intended to alter your fork's travel beyond its original design specifications unless your current fork is already compatible with that specific travel length.

Yes, this air spring assembly is designed to work with both 27.5-inch and 29-inch wheel configurations, provided your fork chassis is compatible with the A2-A3 SID/Reba specifications.

This assembly typically includes the internal air spring components. However, it is standard practice to use fresh suspension grease and new O-rings or seals during installation to ensure a proper air-tight seal and smooth operation.

You should consider a replacement if you notice your fork losing air pressure over time, failing to hold its sag, or if the action feels harsh and unresponsive despite proper air pressure settings. These symptoms often indicate worn seals or a damaged air piston.