The Best rated by MBA. New improved SUMO seat clamp. Suspension now allows for bigger hits taken in stride while pedaling in a seated position. 15% more travel at 2.3", 400mm long, shims for all sizes, self lubricating. Teflon and Delrin bearings, Coil spring with MCU-3 hardness rates avail, (sold with med) preload adjustment, 1 year warranty, fully serviceable with no special tools. Black finish.(Shims sold separately). Lightest at 458g
Sizes other than 25mm or 27.2mm will require a shim.