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Castelli Rosso Corsa 6 Socks

from $8.97 $14.95 40% off

Item # CST0097 Past Season Colors

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  • Black, S/M ($8.97)
  • Black, XXL ($8.97)
  • Black/Yellow Fluo, S/M ($14.95)
  • Black/Yellow Fluo, L/XL ($14.95)
  • Black/Yellow Fluo, XXL ($14.95)
  • Red, S/M ($8.97)
  • Red, L/XL ($8.97)
  • Red, XXL ($8.97)
  • Royal, S/M ($8.97)
  • Royal, XXL ($8.97)
  • White, S/M ($8.97)
  • White, L/XL ($8.97)
  • White, XXL ($8.97)
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Item # CST0097


Castelli's Rosso Corsa Bike Socks treat your feet right.

The Castelli Rosso Corsa 6 is the shortest version of the Rosso Corsa sock. It's the Rossa Corsa because that's the designation Castelli uses for their best gear. They are woven with Meryl Skinlife antibacterial fibers. The sock is thus wicking, will feel dry pretty much in just about every circumstance save a rainstorm. The top of the foot is a diaphanous web, ultra-thin and extremely breathable. In the middle of the foot, the arch area, there is a high-density band woven in. You won't notice any difference in thickness, but you will feel like the sock is becoming one with your foot rather than sliding around between your foot and your shoe. The toe has a flat seam for comfort and the cuff at the top is folded over to keep the sock from slipping.

The Castelli Rosso Corsa 6 Sock comes in three colors: Black, Red, and White. The toes, heels, mid-foot band, and cuff logos are in contrasting colors. Sizes are S/M, L/XL, and 2XL.

Tech Specs

Recommended Use:
road cycling

Size chart



Castelli Socks
US Men's shoe
4-7 8-10 11-14
US Women's shoe
5-7 8-10 11-12
How to Measure:
For best results, take measurements over your underwear.

Reviews & Community

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Castelli Rosso Corsa 6 Socks

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Here's what others have to say...

5 5

Love these socks!

  • Familiarity: I've used it several times

I never imagined socks could improve a ride so much. I bought one pair of these on sale. Liked them so much I bought two more. I am size 9.5-10 U.S. and the L/XL is a perfect fit. Very comfortable for riding in warm/hot weather. If it's cool/cold get the wool socks.

5 5

Lovin the socks!

  • Familiarity: I've used it several times

Great lightweight sock that give a nice snug fit to your feet. No bunching at the toes. If you are on the fence on size, order the smaller size.

5 5

You want them!

  • Familiarity: I've used it several times

I bought a pair of Castelli Garmin Team socks and said in my review I would buy them all over again even in plain white. Well, here they are and available in white, black and red. They fit great, have a porous panel on top of foot for cooling, and wick moisture away from skin very nicely. These are the 6 cm which is the height cuff I like-don't like the 'footies' and don't like the high tops. I wear a 45 shoe and the L/XL fits perfectly.

You want them!
5 5

Great sock

  • Familiarity: I've used it several times

Thin, well fitting sock. Size is accurate from recommendations. Haven't used for extended period so I can't comment on longevity but they are great so far.

5 5

Perfect warm weather sock

  • Gender: Male
  • Familiarity: I've put it through the wringer
  • Fit: True to size

Gorgeous sock, lightweight and breathers well. Ideal for warmer weather.

5 5

Fits just great

  • Familiarity: I gave it as a gift but have feedback to share
  • Fit: True to size

I gave this socks as a gift for my father and he loved them, he said they fit perfectly, they are very soft and on summer they avoid his feet to get too warm.

4 5

Castelli Rosso Corsa 9 socks

This is my first pair of socks from Castelli and they are awesome. Great quality and fit plus they look really cool. Just too bad they are $$$.

5 5

Good Socks

Nice fit, nice fabric. The 6 is a good length. Shoe size 43, 10.5, sock size l/xl. Just Right.

1 5

Arrived in poor condition

I'm not sure who's to blame but the socks I ordered were clearly used. There was a gash down the heel side, defined sweat stains on the soles, and severe damage to the elastic. What's worse is that I paid more for the shipping than the actual sock cost me, then an additional $7 to send it back, so in the end a single pair of socks cost me about $25. Realcyclist lost some points in my book on this one.

Responded on

Wonder if they were returned by someone else previously??? Someone else suggested that before...but if they have the tags on them, I doubt it.
You're right about having to pay the return shipping for defective product...I've had this happen, too...

5 5

Excellent sock, your feet will thank you

I got a size down as recommended, the fit great, keep my feet dry and the perfect temp. The compression band helps with arch support and they look pretty snazzy as well. is the new location for the Rosso Corsa video

5 5

Awesome Pair of Socks

I got them on sale off course and they are worth every penny. The quality of the materials cant be any better, my feet stayed dry and comfortable on a 60 mile ride, What more can I say other than it also looks very nice, Its Castelli. 5 STarZZZZZ

4 5

Good ventilation, style & function

Excellent product - well made. I wear US shoe-size 10 or 10.5. From previous comments I went with size S/M and it turned out a perfect fit. During training rides above 80 F, these socks ventilate the mid-sole region. Previously I was wearing thin running socks from Nike, etc. where heat build-up was a problem. Castelli products have good form and style designed for cycling. So far I have two pairs of these and wear a Castelli fingerless glove with minimal padding - so far I'm getting great results.

Write your question here...What is the...

Write your question here...What is the difference between XXL and 2XL?

Best Answer Responded on

Incidentally, they are one in the same.

Responded on

I know that sounded like a dumb question but they are different prices. Further, the sizing chart is way off. I got the XXL to go on my 10.5-11 feet. The socks were way huge. The L/XL fit exactly.

5 5

Rosso Corsa video

Responded on

It's been moved to:

5 5

Awesome Sock

VERY VERY GOOD SOCK!!! I have 3 pair and all have lasted YEARS. Only other sock that compares is the Swiftwick sock, but the Castelli's look better!! PI and Sockguy and others won't last and don't fit any were near as well as these!! Buy em you'll be glad you did!!

Am I reading the sizing right? If I wear...

Am I reading the sizing right? If I wear a US size 9 shoe then does that mean size L/XL?

Responded on

The sizing chart is way off. I got the XXL to go on my 10.5-11 feet. The socks were way huge. The L/XL fit exactly.

Responded on

I'm a US 9.5/10, I bought the L/XL and the heel cup marking (where sock is different color at heel) ends up covering my Achilles tendon when pulled up tight enough to prevent bunching around my toes. I bought the Medium and had a perfect fit.
Castelli is bizarre fit wise. Socks are typically much larger and shorts/jerseys much smaller. I'm a huge Castelli fan, just takes trial and error trying to get the best fit. Don't get me started on the way Castelli full zip jerseys vs. 1/2 zip jerseys fit....