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Castelli Men’s Bib Short Guide

By Stan Portus –  22 February 2021

Castelli’s bib shorts provide unrivalled comfort and performance. For riding at the weekend, racing, embarking on gravel adventures, or taking part in sportives and grand fondos. This guide explains Castelli’s evolving range.

Bib shorts are the best way to ensure a great ride. Castelli are committed to providing the ultimate race wear, but there is also something for everyone in its collection.

Whether riding at the weekend, every day, racing, embarking on gravel adventures, or taking part in sportives and grand fondos, Castelli’s bib shorts provide unrivalled comfort and performance. 

Rider wearing Castelli bib shorts riding along tree lined road

The Chamois

There are many factors that make a great set of bib shorts but the seat pad, or chamois, is the most significant. As the main contact between the body and the shorts the seat pad plays a crucial role in ensuring comfort and support. Castelli uses two seat pads in its road collection.

The Progetto X2 seat pad is used in all Castelli’s pro-level shorts. The pad is constructed from two layers. The top layer is seamless and made of a four way stretch microfibre that offers maximum softness and moves with the body to prevent irritation. The layer is also seamless to reduce chaffing and has a perforated back that allows airflow. There is a separate saddle shaped cushioning layer that has gel inserts and high-density foam for comfort.

The Kiss Air 2 has a seamless skin care layer to reduce chaffing and abrasion. It is stretchy to move with you. The anatomical shaping of the pad creates the perfect interface between shorts and body. The Kiss Air 2 has variable thicknesses of padding providing the right amount of cushioning in every part of the pad.

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Free Aero Race 4 Bib Shorts

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Castelli Free Aero Race 4 Bib Shorts

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The Free Aero Race 4 Bib Shorts are for all out fast riding. First introduced over a decade ago they have since logged millions of kilometres in the pro peloton and come race day are the go-to short for Team INEOS.

The inner leg is made from Forza fabric, but the outside of the leg is made from Vortex fabric which is dimpled for aerodynamics. Flat lock stitching reduces abrasion. Giro4 leg grippers distribute grip over a large area and stripe mesh straps keep things cool.  

Superleggera Bib Shorts

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Castelli Superleggera Bib Shorts

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The Superleggera Bib Shorts are for riding in the hottest conditions and are ideal for days spent in the mountains. Made from a gradated fabric the shorts use only as much fabric as they have to, where they have to. Thicker panels around the hips provide support but the fabric on the lower sections of the leg is only 90g/m2, meaning they are super breathable and retain minimal moisture.

Close up detail of Superleggera bib shorts
Close up of Castelli name on Superleggera bib shorts

Free Protect Race Bib Shorts

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Castelli Free Protect Race Bib Shorts

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Made in response to a request from Chris Froome for shorts that offer more protection on the hectic early stages of Grand Tours, the Free Protect Race Bib Shorts feature an additional layer of Lycra over the hip and a ripstop inner. This means that in case of a fall there is fabric-on-fabric sheer force protecting the hip and protection against more serious crashes. Made for the pros but appreciated by any cyclist who knows the risks of sliding out. 

Free Protect Race Bibshort gripper detail
Castelli Free Protect shorts close up showing Castelli scorpion logo

Endurance 3 Bib Shorts 

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Castelli Endurance 3 Bib Shorts

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Endurance-level comfort built around the Progetto X2, Castelli’s top seat pad. The Castelli Endurance 3 Bib Shorts are a traditional short that will prove a firm favourite with anyone looking to ride far and in comfort.

A pro-level seat pad demands a great fit, and that’s exactly what the Endurance 3 has. The anatomic cut and mesh bib straps hold the seat pad in just the right place and seams around the hip area create the perfect on-bike shape. The Endurance Evolution fabric provides optimum muscle support and feels dry when you’re riding in the heat of summer or even working up a sweat on the turbo. Also available as bib-less shorts for hassle free riding. 

Unlimited Bib Shorts

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Castelli Unlimited Bib Shorts

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The Unlimited Bib Shorts are designed for riding on any surface. Borrowing the same principle of an added layer of fabric for protection as the Free Protect Race Shorts this extra material has also allowed Castelli to create pockets on either side of the short, providing extra storage for all-day – or even multi-day – excursions. The Unlimited Bib Shorts use a highly resistant 200g/m2 fabric improving durability for whatever riding they are used for. 

Rider wearing Castelli Unlimited Bib shorts  showing the pocket opening


Entrata Bib Shorts

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Castelli Entrata Bib Shorts

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The Entrata Bib Shorts bring together Castelli’s years on innovation into a short that simply works. Offering an ideal entry to the world of bib shorts, the Entrata features the Kiss Air 2 seat pad, Pro Dry Lycra for good compression and moisture management, and has an 8-panel construction for a fit that offers excellent support. The Entrata Bib Shorts are also available as a bibless short, and a bib knicker for cooler conditions.

Rider wearing the Entrata bib shorts showing the internal grippers
Close up showing Castelli logo on the back of the Entrata bib shorts


Competizione Bib Shorts

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Castelli Competizione Kit Bib Shorts

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Some entry level bib shorts offer no thrills. But the Competizione Bib Shorts do. Featuring the same Vortex fabric as the top of the line Free Aero Race 4 Bib Shorts, the Competizione Bib Shorts provide an aero advantage and pro look come that weekend crit race or summer evening TT.

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