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Castelli Aero Race Shoe Covers MR

Sale $34.97 $69.95 50% off

Item # CST001J

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Item # CST001J

When every second counts.

This isn't just any shoe cover. The design of the Castelli Aero Race Shoe Covers MR began last season at the Tour de France's prologue. Using technical fabrics and a sleek design, Castelli has created possibly the most aerodynamic shoe cover on the market.

Using CFD computer modeling, Castelli was able to develop a shoe cover that allows air to flow over its surfaces, giving you every split second advantage over your competition. Lycra was placed on the front where the wind hits the shoe first, and a textured mesh was added to smooth air separation. The shoe cover is secured with a full-length rear zipper.

The Castelli Aero Race Shoe Covers MR come in sizes Small through XX-Large and in the colors Black and White.

Tech Specs

[front] Lycra, [inserts] Aero mesh
3-hole road
Recommended Use:
road cycling, time trial racing
Manufacturer Warranty:
1 year

Size chart


US Men 7 - 7.5 8 - 8.5 9 - 10.5 11 - 1212.5 - 13
US Women8.5 - 99.5 - 1010.5 - 12
EU39 - 4041 - 4243 - 4445 - 4647 - 48

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I'm a fan

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

Bought these last year when I started doing more TT's. So far I really like them. I've used them for 9 races so far. Now, to those that seem not able to keep them from ripping to pieces...just be GENTLE! They aren't over boots so yes they are a bit delicate but no need to be forcing them onto your foot, just take it nice and easy. The only wear mine have gotten has been on the heal where the back of my shoe comes in contact with the ground. Small hole but nothing that hinders there use or even appearance. Temp wise they performe great, I've raced in temps from 40-90 degrees and have no complaints.

I'm a fan

Thanks for the review Sterling! Super helpful to get this feedback out to the community.

Avg. ride time: 8h 4m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Not sure

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: Medium

I managed to snag these for free when CC was offering its strava discount, so it's hard to complain on that score. They were a great value. :D

I wore these at road races and in time trials for just about a whole season and got good use out of them. I have an 8.5 shoe and a medium fit perfectly. I did have a problem with the zipper coming undone in a race and a time trial, but that may just be me being careless in setting the zipper.

As the other review mentioned, these covers are very delicate. The front material is a thin lycra that's intended to smooth out the air flow over the shoe. Any friction, like grazing a moving wheel with the toe, damaged the lycra. Not badly, but enough for there to be a hole the size of a pencil's eraser. I didn't have any problem getting these onto my shoe--just being gentle was enough. You can wear these in warm weather and not be in discomfort (for one chilly road race, I put toe covers on underneath and was fine). The dimpled material in back and underneath is delicate as well. There is an opening for the cleat but not the heel, so the back part of my sole wore a hole on the bottom. On the other hand, the fabric contained the hole and it did not allow it to expand. These clearly are for race use only. If you use them when training or commuting, you may as well take your money and set it on fire.

Why I downrated these is because I can't assess whether they accomplished their sole purpose in appreciably reducing drag in light of the cost. Clearly a lot of thought went into these shoe covers, and they look impressive, but I simply don't know if a plain lycra cover (which can be had at half the cost) is much worse. If they're discounted to something close to a plain shoe cover, I think I would get these again. But not at full retail.