The Mtb Stem 31.8 Stem 60Mm 70Mm 90Mm 25 Degree Wake Mountain Bike Stem Short Feature: Handlebar Center Diameter: 31.8mm (1-1/4") Stereer Tube Diameter: 28.6mm (1-1/8") Degree: 25 Length: 60mm/70mm/90mm Weight: 121g/128g/135g Size: 31.8*28.6*60mm/31.8*28.6*70mm/31.8*28.6*90mm Color: Black Style: High Intensity Stem Material: Aluminum Alloy AL6061 T6 Package Include: 1* Bike Stem Handlebar diameter: 31.8mm (1-1/4"), Stereer Tube diameter: 28.6mm (1-1/8"), Length: 60mm (center distance of the two holes), Weight: 121g Universal short handle bar stem suitable for Most Road Bike, Fixed Gear Bicycle, Mountain Bikes Neck, 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.