Description
Shimano S-PHYRE Flash Shoe Cover
The S-PHYRE Flash shoe cover is Shimano’s aero race cover, built for the riders who count every second. It uses a smooth, stretchy aero fabric that pulls tight over the shoe without wrinkles, so the airflow over your feet stays clean. Shimano shaped it in the wind tunnel, and it was made to fit the S-PHYRE SH-RC910 and SH-RC810 road shoes exactly.
A silicone gripper holds the cuff in place at speed, and the sole opening leaves the cleat and heel pad clear. So you can walk normally and clip in without any fuss. It is a race-day and time-trial piece first. But it also takes the edge off a cold Melbourne morning when a full winter bootie would be too much.
Why the S-PHYRE Flash shoe cover works
Most shoe covers are cut generously so that they fit anything. As a result, they wrinkle and flap, and that costs you drag. The S-PHYRE Flash shoe cover takes the opposite approach. Because it is cut for the shape of Shimano’s own S-PHYRE last, it sits flush against the dials and the upper. In other words, the fit is the aero feature. Shimano quotes measurable time savings from wind tunnel testing, and in practice the cover also keeps the wind chill off your toes, which matters more than you might expect on an early start.
Key Features
- Wind tunnel-tested aero design for measurable time savings
- Stretch aero fabric gives a smooth, wrinkle-free fit over the shoe
- Silicone gripper cuff stays put at speed
- Sole cut-outs keep the cleat and heel pad clear
- Sized to match Shimano road shoes – see the size guide below
Sizing
Small fits shoe sizes 37-39. Medium fits 40-41. Large fits 42-43. XL fits 44-46. XXL fits 47-49. Choose the size that covers your cycling shoe size. Full details are on Shimano’s own page for the S-PHYRE Flash shoe cover.
