Description Masterful.
Castelli's Men's Free Aero Race 4 Short features a new leg gripper design with vertical silicone stripes to keep it in place without restricting stretch. New fabric allows for better print quality. The seams have been updated to improve the fit and make the short look even better on the body. This short also received the updated Progetto X2 Air seamless seat pad featuring Castelli's softest surface fabric.
Features & Specs:
Vortex dimpled fabric on legs.
Forza fabric on inner legs with 38% Lycra® content.
Cooling stripe mesh engineered minimalist bib.
Giro4 leg gripper elastic for better grip distributed over larger area.
Supportive Doppio V construction in front.
Flat-lock stitching.
Progetto X2 Air Seamless seat pad.
Weight: 172g.
Free Exchanges: This product qualifies for free exchanges within the first 60 days after order. We'll cover the shipping both ways for US customers if you need a different size and/or color of this product. Returned product must be in new condition with all labels and packaging. Free exchanges apply only for product in stock or available for backorder.
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
Reviews Ordered by Most Relevant First
5 stars
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Castelli bike shorts
by Pat
Cycling Enthusiast
Summit, NJ
I think Castelli has about the finest bike clothing on the market. These bike shorts are no exception.
Always purchase a size larger however with the Castelli brand.
Reviewed 9/14/2020
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Best Shorts Ever
by Anonymous
Competitive Racer
Eagle, ID
Like all Castelli, order one size up. 5'11" 155 lbs I order large.
Can't even believe how much better these shorts are than anything else I've ever worn. Great pad that is not spongy and annoyingly thick. Great fit around legs. No bunching or climbing up your thigh or anything weird. Look great, feel great, durable. I'm sponsored by another brand that I have to wear when racing. I wear these when I'm out on my longest rides. Worth every penny.
I am a huge fan of shorts, on hot days especially. These are so much more comfortable than any bibs I've ever had. On winter rides, these will be under my tights.
Reviewed 8/7/2020
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Great short, just without the bib straps
by PDXrider
Competitive Racer
Bend, Or
5 of 5 customers found this review helpful.
If you prefer a regular short over the bib version, this is the most comfortable. Great Chamois, Compressive fit without being too tight. Make sure to order up one size compared to other brands like Pearl Izumi.
Reviewed 3/26/2020
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Best shorts ever
3 of 4 customers found this review helpful.
As usual, best fit and durability. Order one size up though.
Im one of the 1% that greatly prefers shorts to bibs. These are my favorite of 5 different brands I currently use.
Reviewed 3/15/2020
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Meets the endurance challenge
1 of 1 customers found this review helpful.
My favorite venue has been endurance rides and double centuries.
The convenience of shorts over bibs becomes apparent.
The Costello Aero stay supportive throughout even the longest rides
Reviewed 12/13/2019
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Comfort for the long haul
Most of what I do is endurance riding, centuries and doubles. I like the convenience of shorts as opposed to bibs and these Castillis provide long ride comfort.
Reviewed 11/21/2019
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Well designed and high quality manufacture and materials.
by Anonymous
Cycling Enthusiast
Seattle
3 of 3 customers found this review helpful.
Very form fitting and runs small - order one size up.
Reviewed 8/26/2019
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Nicest shorts I've ever used
by repp
Cycling Enthusiast
Central Oregon
2 of 2 customers found this review helpful.
I've been a Castelli fan for decades and this short is definitely the nicest so far. A tad on the spindy side but well worth it. Per usual Castelli sizing I am 5'9 175 lbs and usually take a size L in most pants but for Castelli I bought size XL and the fit is just right.
Reviewed 7/8/2019
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The new progetto X2 pad is the plushest of all.
by Anonymous
Cycling Enthusiast
2 of 2 customers found this review helpful.
Pricey shorts, worth every penny though when riding for hours on end. The new Progetto X2 pad is the most comfortable pad of any short. It looks and feels like velvet and is of the highest quality.
I liked the older model Progetto X2 pad and the newer model is way more plush.
Reviewed 5/17/2019
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