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Castelli Premio Bib Short - Men's


Item # CST00FV

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  • Black, S ($249.95)
  • Black, M ($249.95)
  • Black, L ($249.95)
  • Black, XL ($249.95)
  • Black, XXL ($249.95)
  • Black, 3XL ($249.95)
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Item # CST00FV

Stay out all day.

We've all been out on masochistically long rides, some as a result of wrong turns and others to prep for race season, only to be gradually worn down by fabric that can't stand up to the mileage. This season, face your long rides with a short made specifically for the purpose. Whether you're riding a Fondo with the family or heading out on a punishing all-day ride of your own engineering, trust the Castelli Premio Men's Bib Short to keep fit issues out of the equation no matter how long you're out.

Among Castelli's upper echelon, including the Mondiale and the Free Aero Race, the Premio features extra support in the style of the Mondiale, at a more accessible price point. Developed with hours-long training rides in mind, the Premio's highly supportive Lycra blend is cut to follow a close, second skin fit that stabilizes your muscles over the miles, with as few seams as possible to maintain the fabric's fluid, supple feel in the saddle. Though it lacks the laser-cut perforations and bib straps of the Mondiale, the Premio comes with its own airy mesh lumbar panel and clean, bonded seaming on bib straps and legs.

  • Tackle your most ambitious rides in this endurance short
  • Form-fitting cut mimics your movements with a supportive fit
  • Breathable, stabilizing Lycra blend delivers hours of comfort
  • 3D mesh lumbar band gives extra support to lower back
  • Progetto X2 Chamois provides smooth, plush support
  • Raw-edge leg hems lined with light silicone for grip

Tech Specs

[main body] Forza (38% Lycra) [lumbar support] mesh
Progetto X2 Air
Leg Gripper:
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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Unanswered Question

To anyone who has purchased these: Has Castelli fixed the problem with the gel bunching under the Progetto X2 chamois because the front of the gel was not secured in the front of the short? This was a problem for the last couple of years on the Free Aero shorts and bibs. See the reviews on that product. Thanks!

These are the real deal

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

I have a 31-32" waist w/ a 19" thigh measured 8" above my knee cap center. The chart would put me in a size M which all my other shorts are. But I opted for the large; given the compression fit combined with the Castelli fit reputation. The M may have worked w/ a very snug fit but the Lg. are still plenty snug w/ no bunching. I am happy w/ the fit. I think the tighter fit may wear much quicker from stressing the fibers but I could be wrong. At this price they get 1 star off - even tho I'd do it all over again. I hope they last as long as my $35 Carhartt work shorts. They are better than the Free Aero (same size) which are better than....and on down. I have long legs & a short torso so the seemingly tight straps aren't a problem. Someone w/ a long torso will have a different experience. The pad for me is much more comfy than the Free Aero & the lumbar support really worx. I've worn them several times w/ a couple 5+ hour rides & had no saddle issues at the end.

Oh, I'm a guy using my wifes account

Primo Bibs

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

As a Castelli fan, I am always interested in new products and the Premio bib does not disappoint.
Being in the top tier of Castelli bib offerings, the Premio delivers on numerous points and the pros include the super comfy Progetto X2 chamois, seamless legs with no leg bands or grippers ( although a light silicone is applied to keep in place), lumbar support for all day riding, seamless bib straps for no chafing or rubbing.
Although the lumbar feature is there for support, I felt the sides ride up higher, certainly more than the Free fit bibs. The straps ran a bit shorter than other Castelli bibs I own, but this fit short coming could come from using a different, less flexible material.
Overall impression is that these are a great bibs for all day riding, allowing the rider move freely without restrictions and providing comfort.