Brand Size | USA | Waist (in) | Hip (in) | Inseam (in) |
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XS | XS | 30 | 35 | 31.8 |
S | S | 31 | 37 | 32.2 |
M | M | 33 | 38.5 | 32.6 |
L | L | 34.5 | 40 | 33 |
XL | XL | 36.5 | 42 | 33.5 |
2XL | 2XL | 38.5 | 44 | 33.8 |
3XL | 3XL | 40.5 | 45 | 34.2 |
Since 1876, Castelli has been the tailor for the cycling champions. Our riders have worn the world champion rainbow stripes, the Tour de France’s yellow, polka-dot and green jerseys and taken home all three of the grand tours, the classics, six days, you name it.
The Free Aero Race 4 Bibshort is our top race short, which also means that it’s insanely comfortable even if you never pin on a number. Every single fabric, component, stitch and construction method has been updated and improved over time. Eight-hour rides are no problem. Engineered for aerodynamics and WorldTour racing performance.
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COMFORT THAT LASTSThe Free Aero Race 4 Bibshort features the updated Progetto X2 Air Seamless pro-level seat pad for maximum comfort. New seamless skin-care layer is softer against the skin and reduces abrasion and chafing. Separate saddle-shaped cushioning layer with high-density foam and gel inserts provides all-day comfort. |
PERFORMANCE FITThe Forza fabric on the inner leg features 38% Lycra content for perfect fit, and is held in place by the latest iteration of Castelli’s seamless flat Giro leg gripper elastic for better grip distributed over larger area. |
BREATHABLE AND AERODYNAMICStripe mesh engineered minimalist bib construction keeps you cool, offering moisture-wicking properties, while Vortex dimpled fabric on legs provide aero performance. |
Free Aero Race 4 Bibshort | Free Aero Race 4 Short | Endurance 3 Bibshort | Competizione Bibshort | Entrata Bibshort | Endurance 3 Short | |
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Customer Reviews |
4.4 out of 5 stars
224
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4.3 out of 5 stars
32
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4.0 out of 5 stars
223
|
4.2 out of 5 stars
18
|
4.4 out of 5 stars
601
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4.0 out of 5 stars
93
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Features | Premium fabrics and fit | Premium fabrics and fit | Optimum muscle support | Outstanding fabric stretch | Reflective panels on leg | Optimum muscle support |
Seat Pad | Progetto X2 Air Seamless | Progetto X2 Air Seamless | Progetto X2 Air Seamless | KISS Air 2 | KISS Air 2 | Progetto X2 Air Seamless |
Weight | 212 g | 172 g | 181 g | 173 g | 175 g | 181g |
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Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers like the quality and comfort of the shorts. They mention that the fabric is very high quality and the chamois is thin enough to be quite comfortable. They appreciate that the seams are well done with no bulges or rubbing. However, opinions are mixed on the fit.
AI-generated from the text of customer reviews
Customers like the quality of the shorts. They mention that it's a great product, made of good fabric, and has held up well through several washes. Some customers also mention that the chammy is real nice and that it can be worn for 2-5 hours of rides.
"...The mesh has held up well through several washes. Well made bibs and I would recommend them to any rider, not just distance riders." Read more
"...comfortable, hold everything in place with nice compression, and look great as well. Will likely be buying a second pair." Read more
"These are super high quality and very nicely made but run very SMALL. I am a normal large (34" waist) but for some reason ordered an XL...." Read more
"Being a serious road bike aficionado, I really appreciate the high quality of this piece on the road...." Read more
Customers like the comfort of the shorts. They say the chamois is thin enough to be quite comfortable, the seams are all well done with no bulges or rubbing, and the material breathes well. Some say that they've been riding for 25-30 miles and haven't experienced any pain.
"...The seams are all well done with no bulges or rubbing. The material breathes well. The mesh has held up well through several washes...." Read more
"...on compared to a more relaxed fit, but once they're on they are very comfortable, hold everything in place with nice compression, and look great as..." Read more
"...Riding 25-30 miles and not even a HINT of pain. And the cool part is how they fit your thighs. Great product." Read more
"...The modified X2 pad is superb and velvety soft on the skin. Ordered a size medium to stick with my previous Castelli's but this set feels tighter...." Read more
Customers are mixed about the fit of the shorts. Some mention that it fits great, while others say that the sizing is poor and the short is too tight.
"Quality material. The compression is tight on the legs but the rest fits quite well...." Read more
"These are super high quality and very nicely made but run very SMALL. I am a normal large (34" waist) but for some reason ordered an XL...." Read more
"...It fits very well to your body, very light and provides high flexibility when riding!! Great piece!!!" Read more
"...unfortunately, I'm unable to wear them because their sizing charts are ridiculously inaccurate...." Read more