Features: Crafted from light weight aluminum alloys, this 45mm negatives 8° rise handlebar stem ensures precise steering control while shaving weight (164g) for aggressive downhill performances. The 31.8mm/28.6mm double clamps stem offering multiple color option for personality bike customization. Designed specifically for mountain biking enthusiasts and competitive downhill racers requiring responsive handling on extreme terrains. During technical descents, and high speed bike where steering accuracy impacts ride safety and performances. The center distance balances front end stiffness with maneuverability, while its compacts packaging simplifies transport for competition cyclists. Specifications: Color:Four Choices Dimension:87×52mm/3.42×2.04in Component:Aluminum Alloys Package Includes: 1pc bicycles speed downhill stand note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.