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A formulation containing Boron Nitride Compounds
Removable valve core for faster flow of air and sealant
Similar to the Oltre
and ultra-endurance adventures
Shimano RC903 S-Phyre Road Cycling Shoes - Black BackInStock-27-07-2026 A formulation containing Boron NitrideThe Shimano RC903 S Phyre Road Cycling Shoes deliver WorldTour level performance, are lighter than their predecessor and offer an improved fit. The upper uses a microfibre synthetic leather that's flexible to reduce the risk of hotspots developing and includes micro perforations to improve ventilation. Another feature that keeps the feet cool on hot summer days is the lower portion of the tongue using a perforated mesh. Two BOA dials secure each shoe
