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Castelli Mens Free Aero Race 4 Bibshort Kit Version
Castelli Mens Free Aero Race 4 Bibshort Kit Version
Castelli Mens Free Aero Race 4 Bibshort Kit Version

Men's Free Aero Race 4 Bibshort Kit Version

Mfg PartNum:
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Meticulous Evolution

The new Free Aero Race 4 Bibshort is the result of over a decade of partnerships with pro teams. Castelli has implemented miles of racing and riding experience into ensuring that the latest clothing is ready to meet the demands of professionals, and also that of performance-focused cyclists. As one of Castelli's best-selling bibshort for the professional rider and race-ready athlete alike, the latest iteration keeps everything loved about the Free Aero Bibshort and makes a few key improvements.

Minimal and Fast

A brand new bib construction is implemented for a minimalist fit, which has been combined with fabrics that boast better breathability. Featherweight, super-thin striped mesh aids in breathability. When the race turns up, the Free Aero Race 4 will lend to better temperature regulation than before.

New leg grippers lay flat, allowing stretch through all phases of the pedal stroke. Now with vertical silicone, the laser cut raw edges are staying right where they belong, from the beginning to the end of your ride. Receiving the updated Progetto X² Seamless seat insert reduces road vibrations while be extremely soft and comfortable.


  • Freshly updated - Castelli's most popular bib short
  • Vortex dimpled fabric on legs for aero performance
  • Forza fabric on inner legs with 38% Lycra® content for perfect fit
  • Stripe mesh engineered minimalist bib construction keeps you cool
  • Giro4 leg gripper elastic for better grip distributed over larger area
  • Doppio V construction in front for increased support and comfort
  • Flat-lock stitching reduces irritation
  • Progetto X2 Air Seamless seat insert cushions against road chatter
  • 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.


    Fabric: Forza 


    Weight: 172 g


    Temperature Range: 59°-95°F 


    Chamois: Progetto X2 Air Seamless seat pad 


    Discipline: Road Racing 


    Style Type: Bibs 

    Black/Black - Small

    Mfg PartNum: L20003010-2 

    Black/Black - Medium

    Mfg PartNum: L20003010-3 

    Black/Black - Large

    Mfg PartNum: L20003010-4 

    Black/Black - X-Large

    Mfg PartNum: L20003010-5 

    Black/Black - 2X-Large

    Mfg PartNum: L20003010-6 

    Black/Red - Small

    Mfg PartNum: L20003023-2 

    Black/Red - Medium

    Mfg PartNum: L20003023-3 

    Black/Red - Large

    Mfg PartNum: L20003023-4 

    Black/Red - X-Large

    Mfg PartNum: L20003023-5 

    Black/Red - 2X-Large

    Mfg PartNum: L20003023-6 

    Dark Gray/Dark Gray - Small

    Mfg PartNum: L20003030-2 

    Dark Gray/Dark Gray - Medium

    Mfg PartNum: L20003030-3 

    Dark Gray/Dark Gray - Large

    Mfg PartNum: L20003030-4 

    Dark Gray/Dark Gray - X-Large

    Mfg PartNum: L20003030-5 

    Dark Gray/Dark Gray - 2X-Large

    Mfg PartNum: L20003030-6 

    Dark Steel Blue/Dark Steel Blue - Small

    Mfg PartNum: L20003070-2 

    Dark Steel Blue/Dark Steel Blue - Medium

    Mfg PartNum: L20003070-3 

    Dark Steel Blue/Dark Steel Blue - Large

    Mfg PartNum: L20003070-4 

    Dark Steel Blue/Dark Steel Blue - X-Large

    Mfg PartNum: L20003070-5 

    Dark Steel Blue/Dark Steel Blue - 2X-Large

    Mfg PartNum: L20003070-6 

    Black / Vortex Gray - Small

    Mfg PartNum: L20003860-2 

    Black / Vortex Gray - Medium

    Mfg PartNum: L20003860-3 

    Black / Vortex Gray - Large

    Mfg PartNum: L20003860-4 

    Black / Vortex Gray - X-Large

    Mfg PartNum: L20003860-5 

    Black / Vortex Gray - 2X-Large

    Mfg PartNum: L20003860-6