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  • Castelli Premio Bib Short - Men's
  • Castelli Premio Bib Short - Men's
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CastelliPremio Bib Short - Men's
Sale 30% Off$174.96 - $187.46

Item # CST00FV

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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 SpecsSize
Tech Specs
[main body] Forza (38% Lycra) [lumbar support] mesh
Progetto X2 Air
Leg Gripper
Recommended Use
road cycling
Manufacturer Warranty
1 year


Men's Apparel




















































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, good quality and styling

  • Familiarity: I returned this product before using it
  • Fit: Runs small
  • Size Bought: med.

ordered med., need large, but returning because front of bib is pretty low.
Typical Castelli quality and great pad

Would maybe fit a 10 year old

  • Familiarity: I returned this product before using it
  • Fit: Runs small
  • Size Bought: XXL

I am 6 foot 165 pounds and have multiple pair of the Free Aero in XL. I ordered XL in these and returned for XXL. Still not even close! This is anything but Primio!

Someone has no idea how bib shorts are supposed to fit. I'm 6' and 175 lbs and wear Free Aero size medium. This is a bogus review.

Great materials, awkward fit

    The quality of materials is the finest I’ve found from any kit. The fit however was a bit in the awkward side. There is little to no padding near fupa area like other Castelli big shirts and the tight straps gave me a camel toe/moose knuckle, which was a first.

    A Theme Emerges

    • Familiarity: I've used it several times

    Like other reviewers, I'm a fan of Castelli and am excited to try out their best bib (I still have an old pair of Body Paint bibs in my rotation) Just like other reviewers, I found the bib straps to be shorter than I would like. However that does not prevent the Premio Bib Short from being some of the best bibs I have worn. The lower part of the shorts contours to the legs an body incredibly well and feels great next to the skin. The Progetto Chamois seems to get better every season and is perfectly positioned in the shorts. The limited stretch of the straps is most noticeble when putting the shorts on. Once on the bike, they are unobtrusive.

    Great shorts, terrible straps

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

    I love the shorts and the chamois, but the straps are way shorter than my other Castellis. If I were 5'10" these would be perfect. But since I'm 6'2", these are a constant wedgie. If this is how Castelli is going to size their bibshorts from now on, they need to make a large/tall, or I'll have to go back to Rapha or Gore (but Gore are much baggier).

    5 ft 10 inches, 161 lbs 32 inch waist. Can someone provide me a size recommendation? I wear a medium in Pearl Izumi's Elite cycling shorts...

    Definitely size up +1 with Castelli. Italian sizing IS different.

    For you a size L (still they will be snug).

    Definitely size up +1 with Castelli. Italian sizing IS different.

    For you, at least a size L, possibly a XL. Can you try both and send back the pair that don't fit?

    I. Am 72 inches 172 lbs. 32 inch waist bought Large Very HAPPY

    Large. I’m your same size and weight and large fit perfect

    awesome bib, short straps

    • Familiarity: I returned this product before using it
    • Fit: Runs small
    • Size Bought: XL

    I sized up one size as per usual with Castelli and I found these straps to be too short and the legs to be a bit long. Other than that, the materials of the bibs felt luxurious and the chamois feels top-notch.

    castelli premio bib shorts

    • Fit: Runs small
    • Size Bought: xxl

    I bought these the first time I wore them they rubbed my crotsch so hard my the time I can back from first ride with I was so sore I could hardy sit where they rubbed the most,i did not like because of this problem

    castelli premio bib shorts

    • Fit: Runs small
    • Size Bought: xxxlarge

    I thought when ordered they would fit well,well they didn,t they rubbed my bottom so hard I could hardly get home from my first ride with them ,the whole bibs are to shorts for the siz ei was recommended the strapes of they did were to short so everything was to short and very uncomfortable ,I wish I had never bough them ,waste of money ps don,t buy them for your own good you will not be very happy

    Hi Jeffrey,

    Sounds like we need to find you some different shorts to try. I will reach out to you and we can discuss some other options.


    Scott Golsan

    castelli primo bib shorts

    • Fit: True to size
    • Size Bought: XXL

    these are made great,got a larger size and fit great they should last for years

    Comfortable but wish straps were longer

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

    I'm a fan of Castelli Bib Shorts and have run through quite a Few Velo Bibs. I've found I want more compression, longer legs and more leg grip. I like Castelli Bibs because they don't have an oversized chamois pad.
    The Mondiale has an excellent pad and the legs are longer...thank you! I rode a double Century the first time I used it and was very comfortable. Since have done a few more rides if 35- 75 miles and found them to be very comfortable except I feel like the shorts are being pulled too hard up. I'm a pretty big guy at 215 pounds but I wish the straps were a little longer. I might have to try the XXXL for length but then I worry the shorts won't provide enough compression. Also i would be embarrassed to admit I wear a XXXL for the first time after losing so much weight last year.
    I've worn several other shorts but these have become my go to on longer rides. I just convinced myself to buy the XXXL. Please don't tell anyone

    Don't be embarrassed Don! Castelli runs small.
    P.S. -You're out there riding (unlike a lot of folk). Ride on!

    Century Killer

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

    Very Comfortable Best Bibs I have ever worn😀😎

    sizing not great

    • Familiarity: I've used it several times

    I did wear the same size as I always do in Castelli but the legs were quite long. Also the straps were shorter than I'm used too. Even when bent over in riding position they felt tight. I prefer some of the other Castelli short offerings.

    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!

    So far so good for me used on 8-10 long 40-60 mile rides.😎

    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

    How does it compare to the free aero bib in fit? I own a free aero bib in S and it's tight, but ok for shorter rides. If the premio is a little bit more roomy, it would be perfect for me.

    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.