Castelli Fast Feet 4 Aero Cycling Socks - White - S
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Merlin CyclesCastelli White Fast Feet 4 Aero Cycling Socks - Ss26 - / S/M
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£32.95
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Product Information
Full details
The Castelli Fast Feet 4 Aero Cycling Socks are designed for competitive cyclists and time trialists seeking to maximize aerodynamic efficiency through technical apparel. These socks feature an engineered grooved fabric leg section that helps detach airflow to save approximately 2 watts of power at 50 km/h, though they are specialized for high-speed performance and may be less suited for casual, low-intensity rides compared to standard cycling socks.
All features
| Age Group | adult |
|---|---|
| Colour | White |
| Size | S |
| Model Part Number | CS2603000109 |
| Brand | Castelli |
Extended Product Information
FAQs
Are these socks intended for daily training?
While they can be used for training, they are engineered for maximum speed and racing efficiency, so they are best reserved for competitive events or high-speed intervals.
How much power can I save using these socks?
Castelli testing shows a power savings of approximately 2 watts at a speed of 50 km/h.
How should I wash them?
Hand wash with a mild detergent and air dry to protect the integrity of the polyurethane grip and the specialized fabric.
Do I need to wear them with specific cycling shoes?
No, they are compatible with all standard road cycling shoes, though the performance benefit is provided by the leg section rather than the footbed.
Is the grip strip safe for sensitive skin?
The polyurethane grip is standard for high-performance cycling apparel; however, if you have a known silicone or polyurethane allergy, exercise caution.
Troubleshooting
Sock slipping down during a ride
Ensure the skin is clean and free of oils or lotions before putting the socks on to allow the polyurethane grip strip to adhere properly.
Fabric appearing wrinkled or stretched
Verify you are using the correct size; the leg section must fit snugly to maintain the aerodynamic grooved orientation.
Pros and Cons
Pros
- Proven aerodynamic drag reduction of 2 watts at 50 km/h
- High-quality Rosso Corsa comfort for the foot section
- Secure fit provided by the integrated polyurethane grip strip
- Advanced grooved fabric technology for airflow management
Cons
- Optimized primarily for high-speed riding conditions
- More delicate construction compared to standard training socks
- Higher maintenance requirements to preserve the grip strip efficacy
Setup, Compatibility & Care
For optimal performance, pull the socks up firmly so the grooved section covers the lower leg entirely, ensuring the polyurethane grip strip is snug against your skin. To maintain the elasticity and the performance-enhancing grooves, hand wash the socks in cool water with a mild, technical-fabric-safe detergent. Avoid using fabric softeners or bleach, as these can compromise the silicone grip and the specialized fabric weave. Always air dry away from direct heat sources to prevent degradation of the synthetic fibers.
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