The RX8 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 that is optimized to fit with new XTR PD-M9100 pedals while stiff TPU lugs increase pedaling efficiency compared to rubber lugs. All of this comes in a lightweight package at 265g (size 42)