RaceFace Chester 35 Direct Mount Stem: 50mm x 35mm Black Faceplate eliminates 'stress risers' which can cause your bar to bend or break Forged & blasted 2014 alloy for high strength & fatigue resistance at a reasonable weight Four bolt bar clamp holds bar securely in position Interlocking U-Shaped Handlebar Clamp Geometry transferring more load through the stem body and not the bolts S.H.I.S. Stem Clamp Diameter: Direct Mount