The new XTR M9000 wheels represent a decisive development step in SHIMANO's premium MTB wheel lineup: For the first time, carbon-laminated rims are also being used in the mountain bike sector. The XTR wheel range extends from ultra-light and durable race wheels to robust trail wheels in 27.5 and 29 inches; all feature 28 butted spokes front and rear and are equipped with new, lightweight axle and bearing systems.