The S-PHYRE XC903 by Shimano is a top-of-the-line, lightweight off-road cycling shoe designed to excel in challenging racing conditions. It features a Race-Tuned Closure System with dual low-profile BOA Li2 dials for precise micro-adjustment, as well as a shielded bottom dial to protect against accidental release from impacts. The Heel cup is equipped with anti-twist stabilization to ensure a secure foot position during intense accelerations and sustained high-cadence efforts. Additionally, the upper has variable size perforation holes for increased ventilation and elasticity, making it suitable for a wide range of foot shapes. The Shimano ULTREAD XC rubber outsole is lightweight and features a technical tread pattern for exceptional grip on slick terrain. With a stiff carbon sole and low stack height midsole, this shoe offers optimized power transfer and efficient all-day pedaling performance.