THESE ONLY WORK WITH 35MM STEMS and will not fit 31.8mm clamp. Please double check your bike prior to purchasing as we do NOT accept returns. 

From day one, we have never stopped pushing the limits. While the all-new ProTaper MTB alloy bars have evolved over the years, one thing has remained the same: our original ProTaper concept remains: Thicker at the clamping area, tapered down in low-stress sections.