Free 2-Day Shipping on Orders Over $50 100% Guaranteed Returns
Annual Tour Sale—A New Daily Deal for Every Stage

Castelli Aero Speed Sock


Item # CST00KQ

Select options
  • Select options
  • Black/White, S/M ($39.95)
  • Black/White, XXL ($39.95)
  • Black/White, L/XL ($39.95)
  • 100% Guaranteed Returns
  • Free 2-Day Shipping
    on orders over $50

Item # CST00KQ


Fast feet.

We're betting that even if you've aero-optimized your bike and riding gear, you might have overlooked one other piece of equipment, socks. Now with the Aero Speed Sock from Castelli, you can rest assured that your aero game is covered from head to ahem, toe. Its use of aerodynamic materials and construction techniques are specifically designed for an all-out assault against the wind, clock, and competition, and it'll help you shave crucial seconds during that super important time trial, crit, road or track race.

Starting at the top of the sock, an aerodynamic silicone band keeps the cuff in place with a next to skin profile. The lined lycra upper extends from the top of the shoe to the mid-calf to better manage turbulent airflow and provide a smoother profile for the wind to pass over. For the foot, Meryl Skinlife mesh is utilized and prized for its breathability and keeping your feet cool, perfect for when you're giving it your all during a hot event.

  • Socks built to go fast
  • Silicone band keeps cuffs in place
  • Lined lycra upper slices through the wind
  • Meryl Skinlife mesh foot area is wicking and breathable

Tech Specs

[main fabric] 75% nylon, 25% elastane, [ankle] 82% polyester, 18% elastane
Recommended Use:
road cycling
Manufacturer Warranty:
1 year

Size Chart


US MEN'S SHOE SIZE 4 - 7 8 - 10 11 - 14
US WOMEN'S SHOE SIZE 5 - 7 8 - 10 11 - 12

Reviews & Community


Write a review

    Add a:
  • Photos
  • Videos

No file chosen

Rather attach a photo from your computer?


Product Fit:

Runs smallTrue to sizeRuns large

Add Your Size


Height (ft, in):

Weight (lbs):

Size Purchased:

Only jpg, jpeg, png, gif or bmp files please.

Submit ReviewCancel