RockShox Air Spring Kits. Features: Air spring kits do not include top cap assembly unless specified 2013+ Reba/SID/Revelation SoloAir complete spring kit includes black top cap. Can be used to change travel to desired length (not compatible with 2012 and older DualAir forks) SID B: upper tube inner diameter=28.2mm. Internals and chassis parts designed for SID B (120mm max travel) are not compatible with SID A 2013+ Reba and SID B internals are interchangeable Recon and Tora SoloAir spring kits can be converted down with All-Travel spacer kit Specs: Year:2025+ Model:Psylo Silver (A1) Description:SoloAir spring kit (130-160mm)