3-D designed mountain stem is melt-forged then TIG-welded for incredible strength and stiffness. We then use a 4 bolt removable face place for added security and to increase bar stiffness even more. The 3-D design keeps the weight low by removing any extra material that would needlessly increase the stemís weight without adding any strength advantages. +/- 7 degree rise. 1 1/8 in. diameter with added shim for 1 in. forks. Specify Extension: 90, 105, 120 or 135mm.