Syntace Force 109 Mountain bike stems 31,8 mm black Claimed Weight: [135mm] 129 g Steer Tube Diameter: 1.125 in Bar Diameter: 31.8 mm Bar Attachment: 4-bolt faceplate Rise: [60mm,75mm,90mm,100mm,110mm,120mm] +/- 6 degrees, [90mm, 100mm,110mm] +/-17 degrees