Zipp Super-9 Disc Rear Wheel – 700 QR x 130mm Rim Brake SRAM 10/11-Speed Tubeless Black A1. Zipps go-to triathlon and time trial weapon the Super-9 Disc rear wheel gives you the technology needed to do your best. Pro-proven the design optimizes supreme aerodynamics power transfer stiffness lightweight and durability. The Super-9 remains flat from its widest point all the way to the hub. This relatively simple-looking shape results in a wheel thats fast and stiff.

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