The RC503 combines a surround synthetic-TPU-leather-and-mesh upper with a low-stack carbon-reinforced sole. A BOA L6C dial and the model’s lacing path distribute adjustment along the shoe, with a listed sole stiffness level of 8.
This white size 45 version accepts three-bolt road cleats, including the appropriate Shimano SPD-SL cleats. Cleats are sold separately. Use Shimano’s size guidance and your pedal’s cleat requirement to select the pair rather than assuming all Shimano shoes share the same interface.










