Extralite bar clamps kit for Ultrastem/Roadstem, include 2 Al 7075 Txx full CNC made bar clamps (25.4 mm diameter). Weights only 6.0 - 6.5 gr for the pair. The kit is compatible with all kind of Ultrastem and Roadstem (MTB and road both) and if installed on <2011 Ultrastems will save about 2 grams. Not compatible with oversize 31.8 mm stem like Ultrastem OC, Roadstem OC and Hyperstem.