Castelli Free Aero RC bib short review

It might be an evolution of one of the best bib shorts available but is it an improvement?

Castelli Free Aero RC Pro bib short
(Image: © Josh Ross)

Cyclingnews Verdict

Castelli continues to make one of the best bib shorts on the market. It's aero optimised and race-focused and the chamois is better than the competition. When your ride lasts days, instead of hours, the Castelli Free Aero RC bib shorts are an option you can depend on


  • +

    Radio pocket becomes an actual useable feature for the rest of us

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    Straps don't roll when worn or twist in the washer

  • +

    Progetto X2 Air chamois is the best on the market

  • +

    Aero optimisation

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    Logos won't peel off


  • -

    Inner thigh seam still isn’t flat locked

You can trust Cyclingnews Our experts spend countless hours testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

Take a look at our list of the best cycling shorts on the market and you'll notice that Castelli makes multiple appearances. Castelli knows how to make a top-quality bib short and it has options depending on what you are looking for. The variety it offers gives it opportunities to land on our best lists for different reasons. For those looking for a race-focused option, the previous option from Castelli was the Free Aero Race 4 bib short. It was a bib design that had been on the market for longer than most but continued to be one of our favourites. 

This year, Castelli has replaced those bibs with an evolution. The new option comes to market as the Castelli Free Aero RC bib short and brings with it a host of changes. We've spent time with the new option and now we are ready to talk about what's new, what's old, what's great, and what could use some work. If you are looking for a new pair of summer bib shorts then keep reading to see if you think this update from Castelli is going to be the best option for you. 

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Josh Ross

Josh hails from the Pacific Northwest of the United States but would prefer riding through the desert than the rain. He will happily talk for hours about the minutiae of cycling tech but also has an understanding that most people just want things to work. He is a road cyclist at heart and doesn't care much if those roads are paved, dirt, or digital. Although he rarely races, if you ask him to ride from sunrise to sunset the answer will be yes. Height: 5'9" Weight: 140 lb. Rides: Salsa Warbird, Cannondale CAAD9, Enve Melee, Look 795 Blade RS, Priority Continuum Onyx