For those constantly pushing their limits and searching for maximum performance, the all-new RC903 and RC903W womens road shoes deliver the ultimate in road racing footwear.

Pushing hard over rolling terrain. Carving perfect high-speed turns through tight switchbacks. Crushing a precipitously steep climb. Sprinting for the town limits sign against your riding buddies. There is something truly special about giving your all on the bike and knowing that every ounce of energy you put in is transformed into pure pedaling power.

To maximize your efforts on the bike and reach that peak performance, Shimano introduces the newly updated, best-in-class RC903 S-PHYRE Road Shoes. Following extensive, scientific testing and utilizing world class professional riders (Mathieu van der Poel, Primo Rogli, Romain Bardet, and Lorena Wiebes among others will showcase the RC903 shoes at the World Championships) these flagship shoes are the ultimate in elite racing apparel, offering improved comfort, lower weight, and sleeker lines than their predecessor.

Engineered Fit

Employing its proprietary Bikefitting.com pedaling analyzer, Shimano engineers examined 3D data to better understand how riders apply pressure throughout the pedal stroke, identifying distinct zones where force is exerted differently across the shoe. They then optimized the new RC903 and womens RC903W shape and materials to maximize power transfer while maintaining comfort.

Amplifying this slipper-like feel is the BOA Li2 fit system, where two lightweight dials and a new crossover lacing pattern unite to deliver customized micro-adjustability so you can easily tweak fiteven on the fly. The new RC903 also features a new heel cup with a more integrated appearance. Shimanos unique Dynalast shape delivers an expanded fit range to accommodate a wider variety of foot shapes and sizes. The result is a new, secure, anti-twist, stabilizing heel cup that optimizes fit and foot stability, holding your heel in place to prevent movement during hard efforts.

Main Features

• BOA Li2 dials
• Low-profile crossover lacing pattern
• Lightweight and breathable microfiber leather upper
• Secure anti-twist stabilizing heel cup
• Refined toe box fit