Air piston shaft assembly only, (Minimum required part to adjust travel on 2013-15 Reba, Sid-B, Bluto and Revelation SoloAir forks)
- RS-1 (29" 2015) uses the same air shaft as the 26" SID/Reba
- Does not include top cap, top out bumper, negative air assembly, wavy washer or stanchion c-clip
- Not compatible with Dual Air forks