Free Aero Race S Kit Bib Short - Men's

What Our Gearhead® Experts Are Saying:

"I’ve worn this bib for fast group rides and race weekends—it’s light, aero, and doesn’t budge. The grippers are secure but not tight, and the chamois is the best Castelli offers. Honestly, it feels fast just putting it on."

The Free Aero Race S Kit Bibshort is Castelli’s most advanced blend of aerodynamic engineering and high-mileage comfort, designed to meet the demands of WorldTour racing and elite riders alike. The Forza2 Stretch fabric hugs the body with a compressive, aero-optimized fit that helps reduce drag and increase efficiency. According to Castelli, this material alone contributes a 3% reduction in CdA (coefficient of drag area).

Up top, lightweight mesh bib straps sit flat under a jersey and provide support without excess weight. Down below, the Progetto X2 Air Seamless chamois offers multi-density padding with a seamless skin-care layer to enhance airflow and eliminate friction. Raw-cut leg endings with integrated silicone grippers lock the short in place without irritation.

A zippered back pocket provides minimalist storage for a key or gel, and the short’s outer material is rated UPF 50+ to guard against UV exposure. Whether it’s race day or peak training, the Free Aero Race S Kit Bibshort delivers an elite-level experience from start to sprint.