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The wider 13D pulleys increase efficiency and optimize chain management while compatibility with the new SHIMANO 12-speed cassettes significantly expands the range
Its exclusive design has been updated with sharper side panels and a newly conceived rear section
3" (Medium)
Quick assembly tool available
The Mask glasses' polycarbonate lenses provide 100% protection from UVA
Calzini Castelli Aero Race Pro 20 2026 Color:Black The wider 13D pulleys increaseAn aerodynamic sock without sacrificing the features that make it excellent. Thanks to collaboration with expert Italian knitters and the use of advanced machinery, a structure was created that combines smooth and textured zones to control airflow and reduce aerodynamic drag, without compromising comfort and fit. The result is a comfortable sock that stays in place and offers aerodynamic performance comparable to Lycra ribbed cuffs, with the advantage
