Vision's TriMax Pro Si Aerobars are the perfect upgrade for maximizing your free speed. They boast Vision's fine aluminum base bar with its wing-like profile to slice through the wind and light and stiff R-bend butted-aluminum extensions. For dialing in your perfect aero position the arm rests adjust up to 40mm in width and 32mm front to back. These fine aerobars also include comfortable arm rest pads and internal cable routing with rear exits. Plus, you get a slick, glossy powder-paint finish to cheat the wind even more.