FAST FEET 4 SOCK
the Castelli Fast Feet sock has the development and testing to back up the aerodynamic claims.
40,00 €
Color: WHITE
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4236356-001
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PRE-ORDER: This item will be shipped in February
Castelli's Fast Feet project — for maximum aerodynamics
Foot portion based on Castelli Rosso Corsa Sock for in-shoe comfort
Polyurethane grip strip at top to keep sock in place
Leg portion constructed with engineered grooved Lycra® to help detach airflow
For road racing or when you can't wear a Fast Feet TT Shoecover, this sock saves watts.
If for any reason you are not satisfied with your purchase, you can return the product within 30 days of delivery and request a refund.
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Fast Feet 4 Sock
There are lots of so-called aero socks out there. But the Castelli Fast Feet 4 Sock has the development and testing to back up the claim. The few socks that have been tested have probably been tested with a static, nonmoving test because it's easier. But a foot is always in motion, so we created a jig that replicates the movement of the lower leg. And we tested it on actual riders to verify the results. This sock can save 2 watts at 50 km/h. The newest version has an updated cuff fit for more comfort and aerodynamic gains.