With over 120 mm of height adjustment, and 80 mm of reach adjustment, the revolutionary Dahon Axis stem accommodates riders of just about any size, whether they prefer a comfortable upright riding position or an aggressive performance riding position. But even more exciting is the new stem storage system that lets riders easily rotate the stem 90 degrees and out of the way for storage or transport. That means easy convenient folding for Dahon full-size bikes like the Jack and Espresso. Meets EN MTB safety standards. Requires 80 or 100mm NVO Shim not supplied. Back Suits 31.8mm handlebar only. (Jack has 31.8mm as standard)