Castelli Free Aero Race 4 Bib Shorts

GBP 103.52
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Average connection time 25 secs

The Castelli Free Aero Race 4 Bib Shorts draw on 12 years of aero bib short evolution to deliver ride perfection. The Free Aero Race 4 Bib Shorts feature some dramatic, performance-enhancing changes.

Dimpling on the legs stops air attaching to the fabric so that air comes off cleanly and allows for better print quality too. The leg gripper features a lie-flat raw-cut edge with vertical silicone stripes to keep it in place without restricting stretch and leg movement.

The bib shorts' panelling has improved fit for support while making the shorts look even cleaner. Castelli has re-engineered the bib straps with a lighter, more breathable material so they stay cooler, lie flatter and are more durable. A new loop for race radio microphone was added at the request of team riders.

The Bib Shorts use Castelli's Progetto X2 Air Seamless seat pad. The pro-level seat pad consists of two separate layers: a soft stretchy layer that sits next to your skin and prevents any rubbing, and a perforated cushioning layer with two separate density foams along with breathable perforated gel inserts.

Key Features

  • Vortex dimpled fabric on legs for aero performance
  • Forza fabric on inner legs with 38% Lycra content for the perfect fit
  • Stripe mesh engineered minimalist bib construction keeps you cool
  • Giro4 leg gripper elastic for better grip distributed over a larger area
  • Doppio V construction in front for increased support and comfort
  • Flat-lock stitching
  • Progetto X2 Air Seamless seat pad
  • 15-35C / 59-95F
  • Weight: 172g
      Range:
      Free
      Discipline:
      Road
      Cycling Clothing Fit:
      Race Fit
      Weather:
      16°C to 20°C

      21°C to 25°C

      26°C +
      Season:
      AW21
      Brand:
      Castelli

      How long will it take to arrive?

      Please check the stock availability notice on your item when placing your order. This item is: In stock

      Express Delivery


      If ordered before 11pm, delivered by courier next working day.

      How will I know it has been sent?

      You will receive an email to confirm when your item has been sent.

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      Please allow 10 working days from dispatch of your order before notifying us of any late deliveries.

      It may be advisable to check with your neighbours to see if a parcel has been left with them, check any outhouses you might have where it may be left if it cannot fit through your letterbox and contact your local sorting office to see if the item has been returned to the depot as undelivered and awaiting collection.

      If I'm not completely happy with my item?

      Please see our returns policy.

      Frequently Bought Together

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      Castelli Free Aero Race 4 Bib Shorts
      This item
      Castelli Free Aero Race 4 Bib Shorts
      from £103.52
      Select size
      Select colour
      Recommended item
      Castelli Entrata V Jersey
      from £51.76
      Select size
      Select colour
      Add both to basket

      Customer Reviews

      Overall Rating : 4.57 / 5 (14 Reviews)
      • 10 5 star reviews
      • 2 4 star reviews
      • 2 3 star reviews
      • 0 2 star reviews
      • 0 1 star reviews
      See all reviews

      Top Customer Reviews

      Where reviews refer to foods or cosmetic products, results may vary from person to person. Customer reviews are independent and do not represent the views of The Hut Group.

      Fantastic fit

      Great fit and super lightweight ! Quality is really good!! Very impressed with the confort in the saddle for long rides!!

      Very comfy knicks

      This is my 7th pair of Castelli knicks and the 6th with the Progetto X2 seat pad. They are the most comfortable pair of bib knicks I've owned and will continue to purchase in the future. Oldest pair is around 5 years old and the elastic has worn out, but still comfortable. Great deals on these knicks at the moment...

      So far so good

      Have done a couple of moderate rides in these so far, only about 2.5 hours max though, so nothing that really puts them to the test. So far, I rate them pretty highly. The chamois is comfortable, and doesn't chafe. Leg length is good, and I like the grippiness at the bottom of the legs too so they don't ride up. Downside is the straps are too thin, and as usual Castelli's sizing is crazy small. I'm 6'1", around 190lbs and bought the xl, but the straps are just a tad too short.

      Bib shorts

      Went for the next size up (large) which ever one advised and the shorts are prefect but the elastic over the shoulders is ridiculously and uncomfortably tight, I’m average 5’10” height. So if you have average thighs, 30” waist and 5’5” high they would be prefect !!

      Castelli free aero race 4 bib shorts

      This is the second pair of shorts Castelli free aero shorts I have purchased. I am 5’11”, 172lbs and the large fits me well. I find them very comfortable even on long rides.

      Castelli free aero race 4 bib shorts

      This is the second pair of shorts Castelli free aero shorts I have purchased. I am 5’11”, 172lbs and the medium fits me well. I find them very comfortable even on long rides.

      180cm and 78 kg = XL

      I am a huge fan of the top brands, but you have to be aware of their sizings. It is frustrating but its the way it is. The grear is top quality, comfortable, washes well and looks the business. You just have to know your size in their chart.

      Poor quality

      I bought these Castelli bibs this year, wore them 5x max, and there are tears in each suspenders. For the price, I'm really disappointed.

      Really good quality bib shorts!

      These bib shorts feel super good quality and the fit is amazing. I ordered a size L following Castelli's size guide, but I had to return them and order a size XL because they were very tight, especially the straps weren't long enough (I am 6ft). Other than that it feels perfect, the padding has been really comfortable from the first ride.

      As expected - Awesome!

      This is such an amazing bib! I have several Castelli bibs, and this is my favourite. The padding is the most comfortable I’ve ridden on. The fit is a ‘race and aero’ so be aware. The compression is as expected. The shoulder strap is minimalist but very comfortable. I don’t notice it in 3+ hour rides. If you like, flat wide straps then this isn’t for you. Overall, this is an amazing bib! I highly recommend it. I wish I bought another pair when ProBikeKit has that super sale. I’m 174cm and 77kg. I usually wear Large bibs but ordered XL based on my past Castelli purchases.