Features： 1、The Bike Stem is made of carbon fiber material, bringing it light weight, high strength resistance, anti rust durability. 2、There are 70mm/2.8in, 80mm/3.1in, 90mm/3.5in types to be selected, adapt to the usage habits and conditions of different people. 3、This Bicycle Stem is compatible with 28.6mm front fork and 31.8mm handbar, most road bicycles, fixed gear bicycles, mountain bikes, etc. 4、Easy to install, bicycle stems are connected to the original front fork, and the 4 bolt rod clips can firmly fix it in place. 5、The 6 degree stem can achieve a more comfortable riding position and help to reduce the pain caused by the original setup in arms or back. Specification： Item Type: Bicycle Handlebar Stem Material: Carbon Fiber Handlebar Diameter: 31.8mm/1.3in Fork Diameter : 28.6mm/1.1in Stem Angle: 6 Degrees Weight: Approx. 136g/4.8oz Application: For Highway Bike, Mountain Bike Package List： 1 x Bicycle Stem