Handlebar diameter: 31.8mm (1-1/4"), Stereer Tube diameter: 28.6mm (1-1/8"), Length: 45mm (center distance of the two holes), Weight: 130g. Universal short handle bar stem suitable for most road bike, fixed gear bicycle, mountain bikes, downhill bike, track bike, MTB, BMX, DH, etc. Constructed of high-strength CNC machined 6061 T6 aluminum alloy. Easy installation, just connect up the original front fork stem. Four bolt bar clamp holds bar securely in position. Suitable for modified, DIY, upgrade the bike. Downhill, Chongshan, climbing, with them very comfortable., Weight: 0.26 pounds, Manufacturer: WAKE