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Men's Sorpasso RoS Bibknicker

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Backorder: This item is currently out of stock but is available to purchase today as a backorder. The expected availability date shown above is our best estimate as to when it will be shipped to you, but this date is subject to change based on our receipt of this item from its vendor. Shipping in the continental US is free for all backorder items (for international orders, our customer service team will contact you when the item is available to ship). Your credit card will not be charged until your item ships (Paypal requires payment up front, but you can cancel for full refund). Anytime prior to shipment, your backorder can be cancelled by contacting our customer service team.

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.


    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