Shimano xt m8000 optislick gear cable setfitting new gears or completely overhauling your gear cabling couldnt be easier thanks to the shimano xt m8000 optislick gear cable set which has everything you need in one pack featuresincludes 12 mm optislick inner wires 1 x 2100mm and 1 x 1800mm and sp41 outer casing for a complete bike 1 x 3300mm and all end capsrubber shieldsoptislick is electrically coated to the stainless steel inner wire leaving a smooth surface for low friction and red