Box Hex Lab UD Carbon 28.6mm Race BarsThese Box Lab Carbon Race Bars are a first of their kind, built specifically for younger riders with a custom hand laid carbon fiber construction that's the best balance between strength and weight. A high level, race orientated bar that uses Box's proprietary 28. 6mm clamping area, designed to offer exceptional stiffness and unrivaled performance. There really isn't anything else like this on the market. Please note: the maximum recommended rider