The Shimano RC903-PWR S-Phyre Wide is a pure race shoe engineered for riders who want maximum power transfer with a wider, more accommodating fit. Featuring Shimano’s Power Zone lace system, an ultra-stiff carbon sole, and dual BOA® Li2 dials, it delivers locked-in stability and efficient pedaling for high-intensity road riding and racing.
Key Features
- Power Zone lace system minimizes foot movement and improves pedaling efficiency
- Dual BOA® Li2 dials allow precise, independent micro-adjustment
- Full carbon outsole delivers race-level stiffness for maximum power transfer
- Seamless, lightweight upper enhances comfort while reducing pressure points
- Wide last provides increased forefoot volume without sacrificing heel security
- Anti-twist heel cup stabilizes the foot during hard efforts and sprints
Specifications
| Intended Use | Road racing, high-performance training |
| Upper | Synthetic leather with seamless construction |
| Closure System | Dual BOA® Li2 dials with Power Zone lacing |
| Outsole | Carbon fiber composite |
| Stiffness Index | 12 (Shimano scale) |
| Cleat Compatibility | 3-bolt road (SPD-SL / Look-style) |
| Approx. Weight | ~233g per shoe (EU 42) |
| Width | Wide fit |