UCI-Compliant S-PHYRE Aero Shoe Covers Designed to Save Precious Seconds in Time Trials
Shimano's aero-focused S-PHYRE Flash Shoe Covers were developed through extensive wind tunnel testing. By experimenting with several candidates, Shimano found an aero fabric for the upper portion of the shoe cover that significantly reduced air resistance at speeds between 50 and 60km/h. For the part that wraps the shoe, Shimano adopted an elastic fabric that eliminates gaps or protrusions caused by dials or other elements to ensure flap-free stability at high speeds.
Features
- Elastic aero fabric on the legs features vertical grooves that reduce air resistance
- Seamlessly fits RC and other road shoes to eliminate gaps, unevenness, and wrinkles from the calf to the instep
- PU-coated stretch fabric made with 48% recycled polyester ensures a smooth, aerodynamic surface across the foot
- Hook-and-loop fasteners provide a secure fit and easy removal
- Distinct cutaway heel pattern supports natural heel movement and showcases the stylish S-PHYRE RC9 heel cup
- Non-slip silicone print holds the calf section in position
- UCI-compliant cuff height
- 74% Polyester, 26% Elastane













