Rock Shox SoloAir Travel Adjustment Air Shafts. Features: Air piston shaft assembly only, (Minimum required part to adjust travel on 2013+ Reba, Sid-B, Revelation, Pike, Yari and Lyrik SoloAir forks) RS-1 (29") 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 For complete SoloAir assemblies see Air Spring Kits Not compatible with Dual Air forks Specs: Model:SID RLC(A1),SID XX/RL(B1), Reba(A7) Wheel:27.5" Travel:100mm