The Bontrager Speed Concept Mono Bar Extension delivers an even more aerodynamic leading edge to Trek's drag-defying Speed Concept (Gen 2). The Bontrager Speed Concept Mono Bar Extension makes the fastest bike even faster. The OCLV Carbon Mono Bar Extension delivers an even more aerodynamic leading edge to Trek's drag-defying Speed Concept (Gen 2). These straight and S-Bend extensions are designed to be cut to length and have internal routing for standard or Di2 cables. Bontrager Speed Concept Mono Bar Extension Features Designed specifically for 2014 Speed Concept OCLV Carbon fiber mono extensions Straight and S-Bend extensions are designed to be cut to length Internally-routed for Di2 and standard cables Designed to accept 22.2mm standard extensions