The Free Aero Race 4 Bibshort is Castelli’s top race short.

The original Free Aero Race Bibshort was first introduced over a decade ago and has logged literally millions of kilometers under the backsides of pro riders and has been Castelli’s best-selling short. 

The short has undergone numerous updates and improvements in the neverending quest to create the best short Castelli can make. While the basic concept of a minimalist workhorse pro-level comfortable race short remains, every single fabric, component, stitch, and construction method has been updated and improved over time. The fourth major generation of the short features the updated Progetto X2 Air Seamless seat pad. This pad separates a soft, stretchy skin care layer that moves with your body from a generously padded cushioning layer that replicates the form of your saddle. Eight-hour rides are no problem. 

WEATHER CONDITIONS

TECHNICAL FEATURES

• 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
• Progetto X² Air Seamless seat pad

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