Precision Fit for Handlebars: This stem is designed to fit handlebars with a diameter of 31.8mm (1-1/4inch) and steerer tubes of 28.6mm (1-1/8inch). Versatile Compatibility: Engineered to be universally compatible, this short handlebar stem is perfect for a wide range of bicycles including road bikes, mountain bikes, BMXs, downhill bikes, track bikes, and more. Its versatility makes it an ideal choice for both casual riders and professional cyclists. Construction: Crafted from high-strength CNC machined 6061 T6 aluminum alloy, this bike stem is built to withstand the rigors of aggressive riding. Effortless Installation: Installing this stem is straightforward and quick. It connects easily to the front fork stem and is secured in place with a four-bolt bar clamp that ensures your handlebar remains stable and secure, no matter the intensity of your ride. Ideal for Bike Modifications: Whether you're looking to upgrade your bike for better performance or customize it for a ride, this stem is an excellent choice. Product name: Bicycle stem size: 9 x 5 x 4cm : 28.6mm for front fork, 31.8mm for handlebar Applicable: mountain bike/road bike Color: As Shown Material: aluminum alloy Package Contents: 1 * Bicycle Stem Only 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.