Ns bikes proof bars the proof handlebars are really big high and wide and manufactured from a special 7050 alloy material for great strength and fatigue resistance the bars come with 33 inches 84mm of rise and are almost 29 inches 730mm wide with the new school relaxed geometry the proof is really comfortable and looks rather special totally custom tubing and butting results in a strong light bar with a special shape that is visible at the first glance perfect bars for dirt jumper