BIKE STEM - This bike stems features a precision 3D shaped forged shaft interconnected with a precision broached clamp to create the strongest, lightest, most secure adjustable stem available. DIal-in the perfect height for your Handlebars! BIKE STEM SIZE- Sleek aesthetics combine with performance in this Handlebar Stem Suitable for 31.8mm (1-1/4") handlebars, front fork stem diameter 28.6mm (1-1/8") ,Length: 75,95,130mm (center distance of the center of angle disk ),Weight: 320g,Please Confirm Your bike Size Before Your Purchase. ADJUSTABLE ANGLE- -40 angle to +90 angle adjustable according to your habits, the Adjustable Stem It can help you raise or lower the height of the handlebars to improve your position or comfort as you ride. so as to obtain a more comfortable riding experience EASY INSTALLATION- The bicycle stem is easy to install, Just connect up the bike stem riser to original front fork stem. Four bolt bar clamp holds bar securely in position. Increasing the friction between the card slot and the handlebar can effectively avoid the impact of vibration and loss of control during riding.