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Castelli Mens Sorpasso RoS Bibknicker
Castelli Mens Sorpasso RoS Bibknicker
Castelli Mens Sorpasso RoS Bibknicker
Castelli Mens Sorpasso RoS Bibknicker
Castelli Mens Sorpasso RoS Bibknicker
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Castelli Mens Sorpasso RoS Bibknicker 5
Castelli Mens Sorpasso RoS Bibknicker 6
Castelli Mens Sorpasso RoS Bibknicker 9
Castelli Mens Sorpasso RoS Bibknicker 8
Castelli Mens Sorpasso RoS Bibknicker 7

Castelli Men's Sorpasso RoS Bibknicker


Pricing and Order Section

Mfg PartNum: M20523010-4
MSRP: $219.99
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Take the chill out of your winter with the Castelli Men's Sorpasso RoS Bibknicker.

The name of this tight, Sorpasso, means "overtaking" in Italian. That's what Castelli envisioned with the Castelli Men's Sorpasso RoS Bibknicker — to make it a bit faster, better, more comfortable. Made to be technical equipment, making a ride in the widest range of winter conditions possible for a cyclist with any amount of experience on the bike.

The main part of the tight is constructed with Nano Flex 3G fabric, the third generation of impressive nanotechnology fabric treatment that adds a high level of water repellency without affecting the breathability, stretch, or warmth of the fabric. You get a highly flexible, compressive fit that moves with you, focusing on warmth and comfort without making any compromises. To spice things up, a few panels of the Nano Flex Xtra Dry fabric were added to provide extra wind protection in the front panel and over the thighs, as well as in the back for extra protection from road spray. But it's not only about the fabrics — anatomical patterning gives a bend at the knee and the hip, while the seamless bib straps lie flat and securely keep everything in place. Featuring a generously padded Progetto X2 Air seamless seat pad to make long rides more comfortable.

With multiple reflective panels to keep you visible, ride more confidently than ever in the Castelli Men's Sorpasso RoS Bibknicker. As the go-to tight for a full winter's riding, never suffer though long hours through cold nights ever again.


  • Nano Flex 3G fabric for our best mix of warmth, stretchy compression, softness and water repellency
  • Nano Flex Xtra Dry fabric panel on upper front and thighs for extra warmth, and on back to protect from road spray
  • Anatomic cut to hips and knee
  • Reflective inserts for maximum visibility from behind
  • Lie-flat elastic bib straps
  • Progetto X2 Air seamless pad for long hours in the saddle
  • 0°C - 12°C (32°F - 54°F)

  • Free Exchanges: This product qualifies for free exchanges within the first 60 days after order. We'll cover the shipping both ways for US customers if you need a different size and/or color of this product. Returned product must be in new condition with all labels and packaging. Free exchanges apply only for product in stock or available for backorder.

    B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

    Size Chart



    Leg Type: 3/4 Length 

    Style Type: Bibtights 

    Black - Small

    Mfg PartNum: M20523010-2 

    Black - Medium

    Mfg PartNum: M20523010-3 

    Black - Large

    Mfg PartNum: M20523010-4 

    Black - X-Large

    Mfg PartNum: M20523010-5 

    Black - 2X-Large

    Mfg PartNum: M20523010-6 


    Ordered by Most Relevant First
    5 stars
    4 stars
    3 stars
    2 stars
    1 stars
    Reviewed 11/22/2020
    by CH
    Cycling Enthusiast
    Vancouver, WA
    Value Rating
    Overall Rating
    13 of 13 customers found this review helpful.
    Excellent Knicker, let down by the pad.

    I'm a huge fan of knickers. I have owned several pair from several different companies. When my go-to pair for 40-50 degrees, finally wore out, I was on the hunt for a new pair.

    I was looking at these and the Giordana FR-C Pro and was told by CS that the Castelli should be warmer. I bought both and while I loved the fit and pad of the Giordana, I could tell they were not going to be as warm.

    I'm 5'9" and 160lbs and got a Medium.

    The fit is very good. The length goes to just below my calf, which is what a proper knicker should do. They are warm and windproof in the right areas. I rode these on a really foggy day and I was getting moisture build up on the outside of the legs, but stayed dry. The straps are excellent. The fabrics are excellent quality. I never felt clammy.

    The bummer is the pad. While Castelli calls it their top of the line, I prefer the KISS AIR 2 pad. The Progetto X2 pad in these, is not as comfortable. It kinda just flattens out and you feel your seat more. It also feels a little forward and I have to pull the tights from the back occasionally. I know Castelli designs some of their clothing to be race fit and thus worn in a more aggressive, bent over position, so maybe that's what's going on here.

    I have the Nano Tutto Nano kinckers and while they are not as warm, the KISS AIR 2 pad is much more comfortable.

    Over all these are a great knicker for Mid-weight warmth. Fit great, but the pad keeps these from being excellent for me.

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    Reviewed 4/7/2022
    by Joe
    Overall Rating
    3 of 3 customers found this review helpful.
    Works almost as expected

    Works almost as expected. I have several other Castelli riding shorts, and with one exception I've bought size large. I'm 6' and 154 lbs. Large fits tight but and is not constricting. I decided to buy this bib short in XL and it fits comfortably. The only shortcoming is that the portion that covers my knees pulls up while riding and barely cover the top of my calf muscles. Otherwise it does a good job of protecting my knees from the cold.

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    Reviewed 3/4/2021
    by matter
    Cycling Enthusiast
    San Diego
    Value Rating
    Overall Rating
    7 of 8 customers found this review helpful.
    Tight fitting somewhat warm bibknicker - Advise you size to match Free Aero Bibs

    I wear an XXL size in Castelli Men's Free Aero Race 4 Bibshort. I am 5ft 11in, 190 lbs.

    I wanted to try some Castelli Bibknickers so I ordered initially a Castelli Men's Tutto Nano Bibknicker in the XXL size.

    The Tutto Nano felt too heavy and thick compared with the Free Aero shorts. So I returned the Tutto Nano's and tried the Sorpasso RoS Bibknicker in a smaller size (XL). Mistake: They are extremely tight fitting (like the Free Aero Bibs). I thought that i would like the fit like the Free Areos, but the fit in the XL size is too tight to allow circulation in my legs. As a result, they do not provide warmth. This is primarily a sizing problem so I would just advise to buy the same size as your Free Aeros if you have a pair.

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    Reviewed 4/7/2023
    by Chuck
    Twin Coties
    Overall Rating
    The comfort and fit make this bibknicker as good as the description provided. A don't miss tech knicker!

    The sizing is Euro so if you are a medium American purchase a large.

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    Reviewed 2/15/2021
    by Sheriff
    Cycling Enthusiast
    Spokane, WA
    Value Rating
    Overall Rating
    3 of 12 customers found this review helpful.
    Fits well and keeps me warm

    I'm 6'3" tall, 195 lbs, 32" waist and wear a 33" jean length. These bibs fit great! They do a good job keeping the chill off between 40 and 55 degrees. Also from 55 to 65 degrees in temp they are not too hot. Good fall spring riding choice piece of clothing.

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    Reviewed 3/16/2023
    by Anonymous
    Cycling Enthusiast
    Palo Alto, CA
    Overall Rating
    Very Good - need better leg grippers

    Good bib knickers are hard to find. These are very good with one exception that can be fixed. I have a pair of Castelli Rosso Corsa bib knickers from a few years ago and it seems the quality and details of construction of the older pair was better than these newer Sorpasso Rain Or Shine (ROS). I did find the leg grippers to be inadequate - the section below my knee would ride up to the point the fabric of the knickers would bunch up behind my knee. That doesn't happen with my older Rosso Corsa pair which have silicon leg grippers. I solved the problem with the ROS pair by buying silicon gripper material from Amazon (description below) and having those sewn in by my local seamstress. Now they're just fine.

    Silicone Backed Elastic Band Non-Slip Sewing Elastic Band Silicone Elastic Webbing,Black (3 Stripes,15 Yards x 1 Inch)

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    Reviewed 1/21/2022
    by BGSD
    Cycling Enthusiast
    San Diego, CA
    Overall Rating
    5 of 5 customers found this review helpful.
    A top-shelf bibknicker

    This bibk-nicker replaces a previous Castelli Sorpasso knicker that simply wore out after 4 or 5 seasons. In a word this replacement knicker is terrific. The pricing was fair, the fit is tight (I'm a natural medium and one needs to move up one size for Castelli) so the large works well for me. This knicker is very comfortable from <45degrees to 60 degrees and feel quite nice on chilly southern California mornings. The pad is butt friendly on rides of up to 60 miles which is as far as I ridden with this knicker. I imagine they will suffice for extended mileage as well. Overall, a top-shelf knicker at a price that won't cause sticker shock or buyers remorse. Highly recommended.

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    Reviewed 4/18/2022
    by lking
    Competitive Racer
    Anacortes, WA
    Overall Rating
    4 of 4 customers found this review helpful.
    Perfect gear for the PNW early season Riding!

    Castelli sizes run Small so keep that in mind when ordering. These are great Bibnickers and well worth the money. You get what you paid for here with this item.

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