tallac-boa-blk-6-2048x2048- 。Designed for world class cross-country and cyclocross racers, the S-PHYRE XC903 cycling shoes deliver superb all-day ride comfort and complete foot security for more efficient pedaling performance. Shimano’s premier lightweight off-road cycling shoe, the S-PHYRE XC903 is built to thrive in the most challenging race conditions Race-Tuned Closure System: Dual low-profile BOA Li2 dials permit precise micro-adjustment, while shielded bottom dial is protected against accidental release from impacts Lock Down: Heel cup with anti-twist stabilization assures optimally secure foot position during intense accelerations and sustained high-cadence efforts Breathability: Variable size perforation holes in upper increase ventilation and add elasticity, helping accommodate a wider variety of foot shapes Max Traction: Lightweight Shimano ULTREAD XC rubber outsole with technical tread pattern provides exceptional grip even on slick terrain Optimized Power Transfer: Stiff carbon sole and low stack height midsole that stabilizes foot results in efficient all-day pedaling performance