Fast Feet 4 TT Shoecover
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Fast Feet 4 TT Shoecover reduces drag with aero Lycra and silicone-coated fit
What Our Gearhead® Experts Are Saying:
"I’ve tested this against other aero covers, and it consistently performs. The grooved Lycra® around the ankle and smooth finish over the shoe reduce turbulence, and it doesn’t slip—even on aggressive starts. It’s a smart upgrade for race day."
The Fast Feet 4 TT Shoecover is Castelli’s fastest aero foot covering, refined through wind tunnel testing and pro race feedback. Designed for time trials and flat, high-speed races, this shoecover blends multiple aerodynamic materials to reduce drag at a critical contact point. The lower section features a silicone-coated fabric that hugs the shoe for a smooth, uninterrupted surface, while the upper portion uses grooved Lycra® to help detach turbulent air at the ankle.
Flat polyurethane tape at the top edge ensures the shoecover stays in place throughout hard accelerations and sustained efforts, eliminating bunching or slipping that can disrupt airflow. The contoured fit and race-proven design help maximize marginal gains where they matter most.
From individual TTs to high-stakes crits and fast road stages, the Fast Feet 4 TT Shoecover is a smart, performance-focused upgrade for anyone chasing seconds.
Details
- Aerodynamic shoecover designed for time trials and flat road racing
- Silicone-coated lower fabric smooths airflow around the shoe
- Engineered Lycra® cuff with grooved texture detaches airflow
- Flat polyurethane tape at top keeps shoecover secure
- Snug, wrinkle-free fit minimizes drag at high speed
- Proven performance in wind tunnel and real-world race testing
- Item #CSTZ82M
- Material
- [face fabric] synthetic, silicone coating, [ankle] Lycra
- Manufacturer Warranty
- limited 2 year
- Activity
- time trial, road cycling