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  • Castelli Quattro 9 Sock
  • Castelli Quattro 9 Sock
  • Castelli Quattro 9 Sock
  • Castelli Quattro 9 Sock 3/4 Back
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CastelliQuattro 9 Sock
Sale 17% Off$13.99 $16.95

Item # CST00GK

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  • Black, L/XL ($13.99)
  • White, XXL ($13.99)
  • Red, L/XL ($13.99)
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Item # CST00GK

Replenish your drawer.

After realizing you can't remember the last time you bought a pair of cycling socks, you also realized you're down to only one matching pair and a peloton worth of orphaned singles. Before this season's training picks up, replenish your collection with the Castelli Quattro 9 Sock. Simple and streamlined, the Quattro's classic design caters to minimalists. It comes with a highly breathable polypropylene construction prepared to keep you dry through sweltering summer weather, as well as a midfoot support band to prevent bunching or shifting fabric from causing blisters.

  • Replenish a depleted sock collection with this classic
  • Midfoot support band encourages a slip-free fit
  • Hightly breathable polypropylene knit keeps your feet dry
  • Reinforced cuff stays in-place without pinching
  • Classic cuff height lets you hide tan lines when needed
Tech SpecsSize
Tech Specs
9cm (3.5in)
Recommended Use
Manufacturer Warranty
1 year


US MEN'S SHOE SIZE 4 - 6.5 7 - 10 10.5 - 13
EU MEN'S SHOE SIZE 36 - 39 40 - 43 44 - 47
US WOMEN'S SHOE SIZE 4 - 7 7.5 - 9.5  
EU WOMEN'S SHOE SIZE 35 - 38 39 - 41  


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    If you ride in Castelli kit you need to wear Castelli socks. And why not? They make great socks.

    These feature more subtle styling than some Castelli socks. And 9 cm is the perfect height. 6 cm is too low -tho this is person​al.

    All the colors look great. Thin, light, and well ventilated. Made in Italy.

    Sizing: The official sizing chart at the Castelli website is best:
    Cycling shoe size: 36-39 = S/M
    Cycling shoe size: 40-43 = L/XL
    Cycling shoe size: 44-47 = 2XL

    I wear a size 45.0 in Shimano road shoes. The XXL fit perfect,