RX8 marries the top performance features of Shimano’s premium mountain bike and road racing footwear in a shoe that balances pedaling performance and off-the-bike capability. The result is a lightweight, stiff, walkable shoe that is ideal for gravel racers, gran fondo riders, and weekend warriors. The RX8 racing shoe features a super-stiff and efficient full-length carbon outsole with a Shimano stiffness rating of 10 (out of 11). A precise fit is gained from a heel stabilizer, while minimal TPU lugs, micro toe armor, and an anti-slip pad create walkability and protection that is race-tuned for gravel. The cleat-pedal interface features a wider contact point while stiff TPU lugs increase pedaling efficiency compared to rubber lugs. All of this comes in a lightweight package at 265g (size 42). Comfort is critical for ultra-endurance gravel racing events and the RX8 delivers a glove-like fit. The shoe utilizes a one-piece Surround Structure synthetic upper with perforated venting and secures the foot with a single Boa IP1 dual micro adjustment dial. Weight is reduced by utilizing a Velcro strap at the front of the shoe. Super stiff and lightweight carbon composite sole. System engineered with SPD pedals for maximum pedaling efficiency and stability. Lightweight, abrasion-resistant TPU lugs for the best balance of pedaling performance and off the bike capability. Surround upper pattern provides the perfect balance of holding power and absolute all day comfort. Boa IP1 with dual micro adjustment function.