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Castelli Free Aero Race 4 Kit Bib Shorts Men black/dark grey

ID: 899519
- 29%
Incl. VAT, free shipping
Castelli Free Aero Race 4 Kit Bib Shorts Men black/dark grey
Castelli Free Aero Race 4 Kit Bib Shorts Men dark/steel blue
Castelli Free Aero Race 4 Kit Bib Shorts Men black/red
Castelli Free Aero Race 4 Kit Bib Shorts Men dark gray
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Product Description

Meticulous Evolution
The Free Aero Race 4 Bibshort is Castellis top race short, which also means that it's insanely comfortable even if you never pin on a number. The original Free Aero Race Bibshort was first introduced over a decade ago and has logged literally millions of kilometers under the backsides of Castellis sponsored pro riders and has been the best-selling short both in the Castelli retail collection and in their Servizio Corse custom program.

Over this time the short has undergone numerous updates and improvements in the never-ending 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.

Of course the fabrics are premium, made to Castellis specifications by Italy's best fabric suppliers. The Forza fabric on the inner leg features 38% Lycra content for perfect fit, while the Vortex fabric on the side panels is dimpled for aerodynamics. And it's held in place by the latest iteration of their seamless flat Giro leg gripper.


  • Dimpled Vortex material on the legs for improvec aerodynamics
  • Forza material with 38% Lycra on the inside of the legs for a perfect fit
  • Striped mesh material on the straps prevents overheating
  • Elastic GIRO4 leg cuffs for comfortable and larger hold
  • Doppio V construction at the front for more support and comfort
  • Progetto X² Air Seamless Seat Pad for maximum comfort
  • Product is small We recommend you order one size larger. > SHOW SIZE GUIDE <
  • Close-fitting, athletic cut
Intended use
Road/MTB Race  
Leg length
Short (short)  
with braces: yes
with inner trousers: No
Chamois/Pad: yes
172  g
Crotch: 62% polyamide, 38% elastane/ Side piece: 81% polyester, 19% elastane/ Lower back: 82% polyester, 18% elastane/ Back/trouser support: 94% polyester, 6% elastane/ Lower legs: 63% polyamide, 37% elastane  
Seams: Flatlock/flat seams  
Model year
Product number
Customer Ratings
7 Customer Ratings
5 Stars
4 Stars
3 Stars
2 Stars
1 star
Best cycling shorts so far
Beste Radhose bisher
Translated from German To the original

Very comfortable pants, good cut. But you should note that it is the usual size larger. The only downer are the rather long legs (which is currently fashionable) and the color, which is a bit more bluish than expected. All around but still a great pair of pants

Sehr bequeme hose, guter schnitt. Man sollte aber beachten, dass es die übliche Größe größer ist. Einziger Wermutstropfen sind die recht langen beine (Was aber mode ist derzeit) und die farbe, die etwas bläulicher ausfällt als gedacht. Rundherum aber trotzdem eine top Hose

Great shorts
Ottimo pantaloncino
Automatically translated from Italian To the original

Excellent shorts, very comfortable padding even after 7 hours, light braces, excellent place for the radio,

Ottimo pantaloncino, imbottitura molto comoda anche dopo 7 ore, bretelle leggere, ottimo il posto per la radiolina,

Gert Thomsen
Castelli Cycling Shorts
Castelli Cykelshorts
Translated from Danish To the original

The harnesses have already broken and I have written to your support and told you this. I'm still waiting to hear from you. The pillow is perfect and the pants themselves are also in order. Sincerely. Gert

Selerne er allerede gået i stykker og jeg har skrevet til jeres support og fortalt dette. Jeg venter fortsat på at høre fra jer. Puden er perfekt og selve buksen er også i orden. Mvh. Gert

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