One-Up Components Carbon HandlebarsCARBON HANDLEBAR ONEUP CARBON BARS. Strong, lightweight & vertically compliant. The goal for the new OneUp Carbon Handlebars was to make the best feeling bar possible, something that would let us ride harder for longer. The solution is our patent pending oval shape which combines the best ride characteristics of 31. 8mm and 35mm bar standards into one package. This is the most comfortable bar weve ever ridden, period. It's strong, lightweight