For handlebars with 31.8 * 110mm & tube with 28.6mm This handlebar riser bike is tailor-made for your bike and designed to meet the requirements of most bikes the market. Bicycle handlebar riser is compatible with 28.6 mm (1 ") diameter fork tubes and 31.8 mm (1 ") diameter handlebars. Please measure the size of your bike precisely before purchasing. Aluminum Alloy Material & Hexagonal Hole Design The bicycle handlebar stem is carefully made of aluminum alloy for a long service life. The surface of the bike handlebar riser uses the matte process. The hexagonal hole design ensures that the split body fully adapts to the structure, significantly increasing wear resistance and reducing noise. Which can add maximum safety to your riding. Ergonomic design for your riding healthThe adjustable handlebar stem can provide a maximum angle adjustment of 120 degrees and a precise scale, allowing you to freely adjust the desired handlebar height and can change the riding style to relieve waist pain, neck pain, inability to straighten the back and other health problems caused by improper handlebar height. Suitable for ;For women and men of all ages The bicycle handlebar stem is the best choice for all types of riders. Whether your teen's physical growth leads to a need for height-adjustable handlebars, or you are looking for a healthier ride, or you are a mountain bike or road bike enthusiast, you can rest assured that that our adjustable handlebar stem can meet your different needs. Easy assembly, quick and convenient The assembly process of the bicycle handlebar riser is simple and quick. You can adjust the handlebar angle anytime, anywhere with the included hex screws. When assembling, please check carefully whether the screws are tightened to avoid safety problems caused by loose screws.