ErgonomicThe adjustable handlebar stem can provide a maximum angle adjustment of 60 degrees and a precise scale, thus offering sufficient flexibility. Increase the stem position of the bike so you bend less when riding, and ride more comfortably. Set the stem position down, lower the wind resistance and drive faster. Material: The bicycle handlebar stem is carefully made of aluminium alloy for a long service life. The hexagonal hole design ensures that the split body ful Compatibility:Please confirm your bike handlebar diameter is 31.8mm (1-1/4") front fork stem. Four bolt bar clamp holds bar securely in position.The bicycle stem is easy to install, just connect up the original front fork stem. Four bolt bar clamp holds bar securely in position. Suitable for Most BikeAdjustable handle bar stem suitable for most road bike,mountain bikes,downhill bike, track bike,fixed gear bicycle Use the adjustable stem to achieve a more comfortable riding position, the pain caused by the original setup in shoulders/arms/back had to be corrected.Giving you a comfortable and easy riding experience.