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  • Castelli - Sorpasso Bib Knickers  - Men's -

Castelli Sorpasso Bib Knickers - Men's

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24 Reviews


Winter armor.

Given the long hours that real base miles require, your winter gear ought to be at least as comfortable as the stuff you ride and race in during the peak of your season. The pad should remain comfortable over the course of a five-hour ride. The materials should feature little bulk while maintaining body heat so you don't feel like a first-grader bundled up for a winter's walk to school. The Castelli Sorpasso Bib Knickers are part of Castelli's Rosso Corsa line of products, and as a result they get the Italian manufacturer's very best treatment in materials, design, and fit.

The Sorpasso Bib Knickers begin with Castelli's top-of-the-line Progetto X2 pad, the same pad found in Castelli's best shorts. The top layer that contacts your skin is a made from a seamless, four-way stretch microdenier fabric designed to move in harmony with your body and eliminate the chafing that can come with materials with too little stretch. It receives an antibacterial treatment and is bonded to a variable thickness pad made from multiple density foams; the result is a smoothly contoured pad that places the firmest foam where support is most needed. Perforated inserts help to relieve pressure on the sit bones and perineum -- just where riders experience the greatest pressure.

The front of the knickers are cut from wind-blocking Thermoflex Core Due fabric. This two-layer material traps air in a hollow-core layer of polyester while moisture is transported to the outer nylon/Lycra layer where it can evaporate. A lighter material, Thermoflex, is used for the portions of the tights not exposed to the wind to offer excellent breathability. Giro++ grippers keep both the bib straps and calves in place. It's rare to find knickers that are this light and this warm.

Like the bibs in the Rosso Corsa line, the waist of the Sorpasso Bib Knickers is cut very low to eliminate restrictions on breathing caused by pressure on the belly.

The Castelli Sorpasso Bib knickers are Black/white and are available in six sizes from Small through XXX-Large.

  • Hollow core fibers trap warm air and move moisture better than traditional fibers
  • Progetto X2 chamois keeps your nether regions comfortable on long rides
  • Mid-calf length keeps your joints and muscles warm so you can get through your whole workout
  • Item #CST0448

Tech Specs

yes, Progetto X2
Recommended Use
Manufacturer Warranty
1 year

Tech Specs

  • Reviews
  • Q & A

What do you think about this product?

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Just What I Wanted

  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: Large
  • Height: 6'0"
  • Weight: 190lbs

I needed something fornthose in-between weather days or earlier roll outs. Love the fit on these. I am usually a large in Castelli and these show consisting sizing for the brand. The feel is fantastic! Once the legs are warmed up, they just disappear. Everything stays in place and there is no disruption to the peace of the ride. Chamois is spectacular and miles in the saddle go unnoticed. My first ride with these had a good amount of in and out of the saddle but these shifts in positioning prompted no change on the comfort of the garment. Warmth was perfect for 50 F and upward. (I would wear tights for lower.) Absolutely love these knickers!!!

Perfect bib for cold days

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

Very comfortable and warm bib, up to 15 Celsius it is great, but it may get a little too warm in higher temperatures. Usual Castelli size (runs small, but the same as any other Castelli product). Highly recommended.


  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: Large
  • Height: 6'1"
  • Weight: 160lbs

While these are my first pair of knickers, I can't say enough great things about them. I wear them from 40-55F and can't believe I used knee warmers for so many years. They don't ride up and keep my knees and thighs plenty warm. I think they run true to size.

Runs Very Small

  • Familiarity: I returned this product before using it
  • Fit: Runs small
  • Size Bought: XL
  • Height: 5'8"
  • Weight: 195lbs

Runs very small. I'm 5'8", 195lbs, 33 inseam and 36 waist. XL are extremely tight and so back they go for a 2XL

Castelli sizing...

  • Fit: Runs small

Knickers are awesome. Excellent for keeping your knees warm in cool weather. If you ride in Castelli kit, these are great.

Remember, classic Castelli (Italian) sizing applies here. Order the correct size (not too small) and these won't rip. As with all Castelli kit, size up +1 from your normal street size. Even +2 sometimes in Castelli bibshorts/knickers.

My recommendation? Buy two sizes. +1 and +2. Keep the ones that fit best. Return the other (with tags on, etc, of course).


  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: small
  • Height: 5'1"
  • Weight: 107lbs

Love this product! Comfortable, warm, true to size, just what I wanted and needed.

Unnerving ripping sound

  • Familiarity: I returned this product before using it
  • Fit: Runs small
  • Size Bought: Medium and Large
  • Height: 5'10"

Castelli jackets are great. I have a Gabba 2. But everytime I try on their bottoms, I hear an unnerving ripping sound (even when I try something on that should fit.

For the money, you are better off spending more on Giordana FRC.

Maybe the Castelli's will work fine, but I'm not yet convinced by the workmanship. Though I do have a pair of Castelli Veloscimo (sp) bib shorts that worked our pretty good. Oh, and do size up.

not worth the money

  • Familiarity: I returned this product before using it
  • Fit: Runs small
  • Size Bought: medium
  • Height: 5'7"
  • Weight: 165lbs

These knickers run 1-2 sizes to small compared to my other Euro branded bib knickers(Rapha, De Marchi). also disappointed in the construction; not flat seams, big 4 way seam joint in the bottom under the chamois, the "bib" part seemed like an afterthought. buy something else.

Not bad. Not great.

  • Familiarity: I've put it through the wringer

The title sums up my thoughts on these knickers. They're not terrible, but they're not effin' fabulous either.

Seeing as the last reviews are from last winter/spring, I'm assuming the bibs I got are from the '14/'15 season and no one has reviewed the newer ones yet. Some of the things addressed in earlier reviews seem to be resolved, but not all.

Sizing: Yeah, they run small. I'm 5'11 155lbs. The other Castelli Items I've got all fit great in a medium, even the slim and snug San Remo Speedsuit. I ordered the medium, and am sticking with it, but I can't put on any winter pounds...

Chamois: Super comfy. I haven't noticed it being abnormally forward as some previous reviews had mentioned. If I was sitting upright on a beach cruiser, it might be a bit too far forward, but I'm not.

Stitching: When I first put them on, I did hear the popping that others have heard. A bit disconcerting, yes. As of now, about two months after purchasing and plenty of riding, I haven't noticed any stitching issues, but time will tell.

Tags: Castelli!!! Why would you sew the inner tags STRAIGHT INTO THE GARMENT!? I don't want those things scratching my back, so I'm going to take them out, but I cant without undoing the actual stitching. Shame on you.

Waist: Maybe it's because they're so snug, but it is hard to take a piss with these on.

Windproffness: Meh. There's a bit of a chill on fast descents, but for general riding they do okay, but just okay.

Bib straps: I don't like 'em too much. I have a hard time getting them to lay flat. That being said, I haven't noticed them being annoying while riding.

Lettering: No, I don't like being a billboard for free. However, the large branding doesn't affect my riding at all. It's still on there after a handful of washes, but I don't expect it to last, not that it's a huge concern.

Three stars because they work, but there are some things that need to be tweaked.

What the sizing Castelli?

  • Familiarity: I returned this product before using it

HUGE Castelli fan here. Worn multiple jerseys and multiple bib shorts and bib knickers. Ordered these in medium, the same as all my other Castelli gear (and others) and could not fit them over my thighs! Say what?

Huge disappointment

  • Familiarity: I've put it through the wringer

It pains me to say this because I am a loyal Castelli customer, but after 2 seasons of trying to love these, it's time I admit that I hate 'em. The Progetto X2 chamois is the best on the market imo but it's way too far forward in these knickers and doesn't cover my sit bones at all in the saddle. I'm constantly adjusting it on the bike, trying to pull down in front and pull up in back. As a result of all that pulling, I've popped several stitches in the thighs. Also, the leg grippers don't hold (and I have large calves), especially on long seated climbs. They eventually ride up to knee level and, again, I'm constantly adjusting them on the bike. The hallmark of a great pair of bibs is you don't even think about them while riding. Well, that's certainly not the case with these.

wanted to love them - but

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

I tried three different pairs - I had seams split on two in basically the same spot while just trying on (one L and one XL). Seam seperation on the Left thigh where the white accent is and across the front center

The second L didn't split immediately but was a bit tight and I didn't have high hopes for long term performance.

Ended up sending them back. I did buy the Ergo Castelli and those are fine......

Wind rips through.

  • Familiarity: I've used it once or twice and have initial impressions

I'd hope for a lot from these knickers. I really like Catelli as a brand - it is preferred to ride/race in. The Progetto X2 chamois is one of my favorite to saddle up with and this was a massive selling point. The chamois live up to my expectations, and that was all that did.

The fit was fine, a racer fit for certain. (Large - 6 feet, 175 - 165 lbs, 32 inch waist, 42 long coat) I found no real problem with the cut or fit, however, I do feel the waist could be reinforced. The straps are something I'm not used to (they are not the customary mesh), but fit fine.

The quality was a bit lacking as it seemed the black lycra was rather thin allowing the red fleece to show through. The stitching was clearly not windproof, and this was the reason I opted to return them. I wanted something that could handle the winds we can get on the Colorado Plateau 3 seasons a year. The first ride I wore these I could feel the 25 mph winds rip through the seams-temp was 44. After 15 miles I was numb "below the belt" and along the seam lines. I also purchased the Capo GS-13 Roubaix Carbon Bibs, and these with windproof knee warmers beat the Soprasso Knickers.

I really wanted these knickers to work out-the fleece was thick and I'm sure warm. I realize they are not listed as windproof, but I have other knickers and winter bibs that do a far better job at keeping me warm on those cold/cool days 3 seasons a year.

Needs lots of improvement

  • Familiarity: I've used it once or twice and have initial impressions

My third piece of Castelli kit, (recently bought) and I seriously doubt that Castelli will see any more of my money. Overall quality control in this Moroccan-made bib-knicker is way below what an item of this price should be. Like everyone else's, the lettering is coming off after three times thru the hand-wash cycle. After each washing, more loose stitches are found. The shoulder straps are ridiculous, might as well have used bungee cords. The Progetto X2 chamois pad was sewn so far forward, it's really of no use at all in providing any comfort, totally misses the sit bones, and much too thin to begin with. Note to Castelli : The same size chamois pad used in an extra-small does not translate well to an extra-large. To their credit however, the stretch flannel-like material does do a pretty good job of keeping the wind out & the legs warm on cool, early-morning rides. Just not long ones.

You would think companies would make 2 or 3 different size chamois pads for the array of sizes. It's odd a company (not just Castelli) would expect one pad to work in a XS and XXXL. I've had good luck with Castelli's Kiss3 pad for big guys. It seems to be sewn a little further back and feels longer too. Might be worth a try.

Comfortable, look great, poor quality

    I have used these about 15 times. I have to say they are the most comfortable knickers I have ever worn. Once on, they don't feel tight or uncomfortable anywhere, now I know why girls like wearing leggins so much.

    The first time I put them on, I did heard the popping sound everyone is talking about, although I didn't notice anything. After a couple of times I started noticing that the lettering started to come off, that is a little disappointing. I know the letters can't stay on they are just stuck to the fabric, but I was expecting at least 1 full season. Today when I put them on again I started noticing that the stitching on the left leg where the white stripe is, started to come apart. I will send these back and try to get a new pair, hoping the new pair will be better as I have never had such comfortable tights. I have been in 3-5 hour rides without any comfort problem.


    I tend to be able to ride in really cold temperatures but I have worn these from 25 to 60 degree weather, in the rain and snow, never feeling cold where the fabric is covering my skin.


    I am 5'7" 175lbs and I wear a L. With Castelli I always wear large though, so for me getting a large was quite normal.

    Aside from the quality flaw they do look amazing, I hope the new pair will last longer. If they do, these are a must have!

    Comfortable, look great, poor quality

    Poor Quality Control

      I have a lot of Castelli clothing. I ordered these in late November and didn't have a chance to use them until late December because it had been too warm. Anyway on the first ride I noticed faulty stitching at the top of the white flash on the left leg. On getting home and looking closer I see it is cause by the machinist not fully overlapping a seam join. I sent them back and got a replacement - exact model and size hoping it was a one off. On receiving the new pair they have the exact same fault in exactly the same place. Looking further at them, these have 2 other areas of faulty\incomplete stitching The red tape at the stomach is not stitched properly so it forms a hole and the Progetto X2 chamois is not stitched together properly. Needless to say these are also going back. This particular Castelli item is made in Morocco - must be poor quality control but very disconcerting.. As I said I have many other items of Castelli clothing and these have all been excellent. Not sure if I should risk a 3rd try?


      good tights

      • Familiarity: I've used it several times

      i got a pair of these last season and wore them a few times. They are very comfortable and do a great job in keeping the cold out. They do run a size small so i would suggest sizing up on them. over all a good pair of tights

      Weird sizing, but great when they fit

      • Familiarity: I've used it once or twice and have initial impressions

      I am 5'7", weigh 155, have a 31" waist. What size do I wear? Large. Even at that size my initial thought was that they were too small. However after a couple of wearings they have stretched out nicely and fit quite comfortably. I did experience, as some have mentioned, that popping sound like fabric tearing. However, a careful perusal of the garment shows no damage.

      These are great looking knickers, very warm and comfortable, but you have to figure at least one size larger than you wear normally, even within the Castelli line. I own a pair of Castelli Ergo Knickers and Ergo Shorts, both in Medium, so there in no correlation between models and sizing. Get the right size and you will love them.

      Great for cool weather riding

      • Familiarity: I've used it several times

      Appearance and Fit: As with all Castelli items, you should probably size up if you have any quads at all. I have a 29" waist and took a medium--a perfect fit (see photo). The tights are smart-looking and tasteful. Even if you haven't graduated yet from the tricycle, you'll look like a pro wearing these.

      Functionality: Knickers are for those days when its too cold for shorts but full tights would have you overheating. Castelli rates the Sorpasso knickers for rides in 54-68 degrees, but you can actually go much cooler. I've worn these on a 7am ride with clear skies and a 10mph wind when it was 40 degrees and felt perfectly comfortable the entire ride--dry and warm, but not hot. I can only see wearing these on the upper end of the temperature range if it was cloudy and windy out. The pad was like sitting on a cloud, it was that soft--I practically didn't even notice it. The Louis Garneau tights I have feel bulky and cumbersome compared to these--the Sorpassos are nearly as unobtrusive as Castelli's riding shorts. This is what you're paying for. With these knickers, you'll have gear that not only looks good but you hardly notice it's there.

      Great for cool weather riding
      Unanswered Question

      so there is a problem with the lettering...

      so there is a problem with the lettering...bring the price down

      Are the bibs full lenght and are they...

      Are the bibs full lenght and are they thermal?