Shimano S-PHYRE Flash Shoe Cover - Black Size:S Featuring a 23mm internal rim

Featuring a 23mm internal rim width

while an Instant Drive 360 freewheel coupled with our automatic bearing preload adjustment (QRM Auto) delivers fast engagement and durability

Directional chain

7 x 9 mm (oval)

Shimano S-PHYRE Flash Shoe Cover - Black Size:S Featuring a 23mm internal rimShimano utilized extensive wind tunnel testing when developing the S PHYRE Flash Shoe Covers in the quest to conserve as much energy for the rider as possible and to make every second count. Extensive use of elastic aerodynamic fabrics and a tightly wrapping, wrinkle free fit creates maximum aerodynamic efficiency. The tall cuff (which has a UCI compliant height) with wind cheating vertical grooves utilizes a no slip silicon grip fabric to keep these