This design improves the aerodynamic properties of the stem, which is something road racers will appreciate.[BIKE STEM SIZE]- Sleek aesthetics combine with performance in this Handlebar Stem Suitable for 31.8mm (1-1/4inch) handlebars, front fork stem diameter 28.6mm (1-1/8inch) ,Length: 89.7mm,Weight: 135g.Bicycle handlebar stem Made of high quality 3D aluminum alloy, sturdy and durable, not easy to deform and rust,Matt black finishing makes it extremely easy to wipe off and clean,Suitable for most mountain bikes, road bikes, fixed gear bicycles, , etc. Come DIY to upgrade your bike for a more comfortable riding experience.The bicycle stem is easy to install, Just connect up the bike stem riser to 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.Colour:redMaterial:Aluminum alloyPackage Contents:1 x bike StemOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.