Whether we want to improve our overall speed, climbing pace, or acceleration, the Mavic Cosmic Ultimate 45 Wheelset will take us to the next level. Optimized for road racing or high-speed training rides, this incredibly lightweight wheelset features a full carbon rim construction and an aerodynamic shaping to save as much weight as possible while keeping the stiffness and reactivity high. This wheelset features a variety of technologies, including Instant Drive 360 freewheel technology, R2R carbon spoke technology, and a tubeless UST rim to keep the rolling resistance low and offer predictable stability as we race our way to the top.