The Trimax Carbon OS Base Bar flat is an ideal lightweight basis for your custom aero bar setup. It’s carefully designed for aerodynamic efficiency, and with a 3:1 aspect ratio on the aero sections it’s legal for use in UCI competition. Full carbon construction keeps the weight low, and a generous straight 31.8mm centre section accommodates most clip-on aero extensions. For the cleanest possible lines, the Base Bar has internal cable routing, with ports able to accommodate Di2 electronic shifting cables. The flat version of the bar has a 0mm drop.