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Castelli Free Aero Race Kit Version Bib Short - Men's

Sale $119.97 $199.95 40% off

Item # CST00AW

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Item # CST00AW

Never be disappointed.

It's time to face facts: you've spent a huge chunk of your rides standing out of the saddle to avoid riding on your flattened chamois. As helpful as that's been for your form, spending an entire ride in the big ring isn't sustainable. Accept that your loyal bib short has earned its right to retire and replace it with the Castelli Free Aero Race Kit Version Bib Short so you can get back to riding normally, and comfortably, again.

Whether you're building base miles for a fall century or have a full calendar of summer races lined up, the Free Aero blends race fit with long-ride comfort, distinguishing itself as a supremely versatile piece of kit. While you keep track of your computer's ever-changing report on cadence, speed, and power, Castelli's alternating panels of Forza and Vortex fabrics follow your body movements with a contoured fit, stabilizing your muscles during long rides or races. The construction aims to reduce wind resistance while continuously pulling moisture away from your skin on the days you can't avoid riding during peak midday heat.

For the all-important chamois, Castelli continues its successful blend of comfort and functionality in the Free Aero, choosing the Progetto X2 Air to stand loyally between you and the saddle for the entirety of your ride. Stretchy fabric, luxurious cushioning, and a flexible design mean you won't be dealing with chafing or a chamois that can't go the distance. Pair that with supple, light leg grippers and barely-there bib straps in an unrestricting cut and you have all of the makings of a new favorite.

  • Cheat the wind while staying comfortable on your next ride
  • Contoured, supportive fit wards off muscle fatigue
  • Efficient fabric construction continuously wicks moisture
  • Minimal bib straps won't restrict movement or breathing
  • Luxuriously soft chamois moves with you while lending support

Tech Specs

[outer legs] Vortex, [inner legs] Forza (38% Lycra)
aero race
Progetto X2 Air
yes, Carré yolk
Leg Gripper:
Giro Air
Claimed Weight:
[large] 178 g
Recommended Use:
road cycling
Manufacturer Warranty:
1 year

Size chart


Men's Apparel
Chest 36.2in
Waist 31.5in
Hip 37in
Inseam 31.9in
How to Measure:
For best results, take measurements over your underwear.
Measure under your arms, around the fullest part of your chest.
Measure around your natural waistline, keeping the tape a bit loose.
Measure around the fullest part of your body at the top of your legs.
Using pants that fit well, measure the crotch seam to the bottom of the leg.

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Castelli bib

  • Familiarity: I've used it several times
  • Fit: Runs small

Great fit and quality as with most Castelli products. I ride a great deal with their products and as of yet have no negative comments, except for some sizing difficulties once in a awhile. I whole-heartedly recommend their products!

Avg. ride time: 3h 5m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Go-to shorts.

  • Familiarity: I've put it through the wringer
  • Fit: Runs small
  • Size Bought: XL

I used to be an avid Pearl Izumi wearer, until I ran into these on promotion. Put it simply, these easily beat their pro-level shorts. The chamois doesn't chafe, the fabrics are softer and less irritating, and the leg grippers are completely mind blowing. And for the same price (on sale) no less.

Just get it. Be sure to size up though. Pearl Izumi large perfectly goes into Castelli XL.

Comfortable bib shorts

  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: Large

I compare these to the endurance shorts of the same brand. These are more comfortable with better leg grips. Chamois is excellent. I like the color combination better than all black. The stitching and construction is better than the endurance model bib shorts and looks less prone to come apart

Thanks Tim! Your review is especially good for me because I was trying to figure out sizing. Since you are tall and slim, it aligned well with my needs. Thank you!!