Apply To: XC. Carbon Fiber Twill: UD. MaterialCarbon, Carbon Fiber. Head Tube: up 1-3/8" (49.5mm),down 1-1/2" (52mm). Weight: 2000g (Size M, with rear shock). Compatible Bike TypeMountain Bike, Cyclocross Bike, Universal, Fitness-/Crossbike, Racing Bike, Touring Bike.