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"The full disc construction is engineered to minimize aerodynamic drag and maximize efficiency at speed. Designed for time trials and triathlons, it helps riders maintain momentum and conserve energy over long race efforts.

When paired with the DURA-ACE C99 front wheel, the Rear Disc completes SHIMANO's most aerodynamic wheel system. Together, they deliver the efficiency and speed retention needed for time trials and triathlon racing.

Carbon fibre construction, hooked rim. Average weight: 987 g

Cup & cone bearings, center lock Disc Brake, tubeless ready" - Shimano