A technically advanced design allows the Evolve stem to handle serious \'All Mountain\' riding at a very competitive, race ready weight - 160 grams (100 mm). The Evolve is a high performance stem at a reasonable price. Features: Forged & blasted 6061 aluminum for high strength & fatigue resistance at a reasonable weight. Four bolt bar clamp holds bar securely in position. Interlocking U-Shaped Handlebar Clamp Geometry. Faceplate eliminates stress risers which could cause your bar to bend or break. This is particularly important for carbon bar users. Specification Built for: XC / Trail / AM. Rise: + or - 6° (reversible). Bar Diameter: 31.8mm. Stack Height: 38mm. Weight: 160g (100mm). Colour: Black.