Ns bikes proof alloy riser 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 3.3 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 jumpers who use suspension forks, and the choice of most of the ns team riders. The bars took martin soderstrom and sam pilgrim to the podium countless times during the last few seasons. Ns bikes proof bars specifications material 7050 t6 alloy clamp 25.4mm width 730mm 28.7 rise 84mm 3.3 backsweep 10176 upsweep 4176 weight 365 anodised, 375g paintedbuy ns bikes components from chain reaction cycles, the world's largest online bike store.