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Castelli Mens Endurance 3 Bibshort Belgian Blue
Belgian Blue
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Castelli Men's Endurance 3 Bibshort

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Mfg PartNum:
(33 customer reviews)
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MSRP: $159.99
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Endurance-Level Comfort For Every Ride

When it comes to the best-of-the-best in cycling apparel, be sure to not overlook the Castelli Endurance 3 Bibshort for men. The main story of this short is the use of Castelli's renowned top-of-the-line Progetto X2 Air Seamless seat pad in an otherwise traditional short. But in fact, every little detail has been obsessed over to ensure your comfort on your next long endurance ride.

The seams of the chamois pad are placed around the hip area to create a perfect shape on the bike. The Endurance Evolution fabric has a soft hand while providing good compression and excellent moisture management. And it's all held in place with the amazingly comfortable GIRO3 leg gripper.

This short offers exceptional value and is ready to deliver lasting comfort on your longest rides. Weighing in at an impressive 186 grams, the Castelli Men's Endurance 3 Bibshort is prepared to rock the world of cycling. With an anatomic fit that is perfect for your biking stance, the Endurance 3 makes any mountain more fun.


  • Endurance Evolution fabric provides optimum muscle support and feels drier in nearly all conditions
  • Anatomic cut for perfect on-bike fit
  • Mesh bib straps and back to keep you cooler
  • Progetto X2 Air Seamless seat pad for even greater comfort and improved airflow
  • GIRO3 leg grippers lie flat
  • Lightweight 186g weight

Performance fit: Castelli apparel is designed with a performance cut that often runs smaller than that of other manufacturers. Consider sizing-up one size to ensure a comfortable fit — e.g., if you typically wear a Medium, select a Large in Castelli.

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.

Size Chart




Style Type: Bibs 

Black - Small

Mfg PartNum: L4521005010-2 

Black - Medium

Mfg PartNum: L4521005010-3 

Black - Large

Mfg PartNum: L4521005010-4 

Black - X-Large

Mfg PartNum: L4521005010-5 

Black - 2X-Large

Mfg PartNum: L4521005010-6 

Black - 3X-Large

Mfg PartNum: L4521005010-7 

Belgian Blue - Small

Mfg PartNum: L4521005424-2 

Belgian Blue - Medium

Mfg PartNum: L4521005424-3 

Belgian Blue - Large

Mfg PartNum: L4521005424-4 

Belgian Blue - X-Large

Mfg PartNum: L4521005424-5 

Belgian Blue - 2X-Large

Mfg PartNum: L4521005424-6 


Ordered by Most Relevant First
5 stars
4 stars
3 stars
2 stars
1 stars
excellent seat pad
by Trucker
Cycling Enthusiast
Foothills in Amador county

Great bib and the Progetto X2 seat pad is the best ever. I really like the Kiss 2 seat pad but this one works even better for me. Rode 80 miles today and was so comfortable at the end of the ride that I ordered another pair. Give this bib a try as I feel you'll find it exceptional in every way.

Reviewed 11/4/2023
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Well made and with quality material. Not inexpensive.
by KD

Used for long rides 4-8 hours. Ordered M and it is a good snug fit for a 32 waist. Wear with chamois cream and so far no chaffing or other usual issues. Have bought again for multiple day rides.

Reviewed 10/24/2022
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Excellent bibshort/great price
by Dave R.
Cycling Enthusiast
Kansas City, MO

Purchased these on sale and with extra points were a great price. Shorts are very comfortable, have Castelli's high end seat pad. I use them for rides ranging from 40-100 miles. So far have been excellent. I prefer the silicone grippers on the legs. They just stay in place the best for me. Size, I normally purchase XL in Castelli bib shorts. With these I had to go to 2XL. They run even smaller than normal. I'm tall/thin 6'6' 185-190 lbs. 32-33 waist size. Length on the legs is also ample even for my height. They might be a little too long on shorter riders? Plan to buy more of these.

Reviewed 6/16/2023
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Size is way off
by Murph
Cycling Enthusiast

I�m 5�11�, 215-220lbs, I wear pants with 36� waste. I wear XL in ASSOS, LG and Pearl Izumi bibs. I checked the sizing chart for these bibs and other people�s comments so I purchased an XXL Endurance 3 Bibshort. Tried them on before riding, they were tight but I thought they�d work. Man was I wrong, I went out for a 50 mile ride, chamois was nice but things were to snug around the man parts. Straps were tight and didn�t lay flat. Now that I�ve ridden in them, guess I�m stuck with them. Rolled the dice on these, should of put the money towards another pair of ASSOS bibs. Hope this review helps the next person.

Reviewed 5/23/2023
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Great bibs
by Biker Dad
Cycling Enthusiast

I ride a minimum of 5 days a week, 12+ hours. I have found these bibs to be durable and comfortable. I have done short races in them and long endurance events. They have become my "go to" bibs.

Reviewed 8/28/2023
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Crazy sizing, too restrictive
by Kurt
Cycling Enthusiast
1 of 1 customers found this review helpful.

The construction of the shorts is very good, and I love the chamois, which is the best I've tried. The material feels and looks expensive. However, I can't wear these bibs on anything but short rides. I sized up and bought XL, just as I did with another Castelli bib that fits. They were too small, so I returned them and bought XXL. That alone is strange because I use large with other products, and even medium with some manufacturers. The issue was first, the tightness of the straps. I'm 189cm (6'3"), and XXL is still a little too tight with the shoulder straps. The second issue is that the material doesn't stretch much, and I have sprinter thighs, so where other bibs stretch to accommodate, these don't and they bind in places. I could have sized up to 3XL, but then they'd be too big in places.

I think if you're smaller, and you have thinner legs, these could be perfect, but they won't stretch to fit you.

Reviewed 11/25/2022
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Great Bibshort
by Anonymous

The Castelli brand has great quality. The Progetto x2 Air is the most comfortable chamois I own. The size does run small be aware.

Reviewed 6/30/2023
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You deserve this kind of comfort.
by John B Jr
Cycling Enthusiast
SF Bay Area

No comparison between the team wear and this piece. Long rides on consecutive days usually take a toll but the padding on this bib short make the hours go by without even noticing discomfort. Get yourself some pro-level shorts if you've hesitated. These don't have the most technical fabric but they do seem durable and supportive. It's really the chamois that sets these apart from everything else I've used.

Reviewed 11/4/2022
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Super comfy
by Cesar4
maspeth, queens

I have 4 of these in total I think and will be getting more to keep for backup. They are so comfortable. I tried a lot of bibs on here, and these and these are one of my favorites for long rides.

Reviewed 5/15/2023
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Durable Everyday Bibs
by John
Cycling Enthusiast
Westchester & NYC
2 of 2 customers found this review helpful.

These are solid bib shorts, well-made, low profile and comfortable. Sizing: I am 5'8", 150 lbs, 31" waist, and I wear Large Castelli bibs and Medium Castelli jerseys. The Large in these shorts is very snug on me, and an XL probably would have fit too. That said, they're very comfortable on the bike, and the chamois is excellent. The fabric is a bit stiff compared to other Castelli shorts I own, but they feel like they'll last forever. I like the minimal branding, too.

Reviewed 6/9/2022
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Well worth the price...
by primetime4
Cycling Enthusiast
3 of 3 customers found this review helpful.

Before picking up my first pair of Castelli bibs, I mainly wore PZ shorts. The Competizione bibs were a night and day improvement over the PZ chamois and I was never looking back. When I first got the Endurance bibs, I was a little disappointed comparing them to the Competiziones. The material is thinner with no texture and the grippers did not feel as robust. However, the chamois was clearly different so I decided to give them a try. Boy was I wrong with expectations. First off, the chamois is much improved which I did not know was even possible. I literally do not even know the bike is there. Secondly, the grippers and material somehow offer more support while breathing better at the same time. These are my new go to bibs for longer rides and literally cannot wait to put them on.

Reviewed 1/6/2022
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Best for the price
by cesar4
Maspeth, NY

These bibs are extremely comfortable on long rides. The padding just feels so on point. I've gone on a 5hr bike ride and no pain at all.

Reviewed 6/12/2023
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Good quality, crazy sizing
by Kurt
Cycling Enthusiast
9 of 11 customers found this review helpful.

The quality is excellent, and each part of the fabric is perfectly contoured to fit. The chamois is a step up from the one in my older pair of Castelli bibs. It's super light and minimalist.

Castelli sizing, however, makes no sense. I wear a large in everything, so I ordered an XL, knowing Castelli runs small. My other set of Castelli bibs is XL. I tried these on and could barely squeeze into them, so I had to exchange them for XXL. It's hard to buy Castelli because the sizing isn't consistent.

Reviewed 7/11/2021
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Worth the money
by Bikerdad66
Galesburg IL

I am a loyal Castelli wearer. I decided to upgrade from the endurance 2. Just a few rides but I like the fit, the chamois seems a tad more comfortable. I can�t wait to put in some long rides to check the endurance label

Reviewed 10/28/2022
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Love these bibs.
by Anonymous

Right out of the box you can see and feel the quality. Pad is super comfortable...front and back. Leg compression is just right. Shoulder straps are so comfortable you'll forget that they are there. Seams are flawless. Put them on and forget them!

Reviewed 7/14/2022
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Best Bib I Own
by CvK
2 of 2 customers found this review helpful.

The chamois on these are the perfect thickness. Not too thick that makes you move around and not too thin to make a long ride difficult. The chamois is also so good that I only need chamois cream on very long rides. The silicone grippers are also fantastic and never slip. I'm 6' 190 and these are XL which fit perfectly. Everything about these are great.

Reviewed 6/16/2022
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Great fit in riding posture with comfortable chamois
by zoilus tott
Cycling Enthusiast
Albuquerque, NM
2 of 2 customers found this review helpful.

5; 9", 32 waist, I ordered the large and fit perfectly. Sizing up led to a comfortable ride with good compression and padding. Good wicking and overall comfort. About 150 miles ridden in them including a 50miler, and no complaints at all re comfort.

Reviewed 6/12/2022
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Best castelli endurance Bib ever
West Palm Beach
2 of 2 customers found this review helpful.

I have been riding Castelli bibs for the last 8 years, and I am extremely happy of that last 2 I ordered and used for Unbound gravel.

Very comfortable, maybe on the heavy side but no butt pain after 14h on the bike.

Reviewed 6/11/2022
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Nice fit - not a lot of padding in the seat.
by cunnindj
Cycling Enthusiast
Durham, NC
0 of 3 customers found this review helpful.

I already had the Endurance 2 and as far as I can tell the Endurance 3 is the same. Fits perfectly but there's not a lot of padding in the seat. Not really a problem for me - just comparing it to other shorts I have. Workmanship is excellent.

Reviewed 12/2/2021
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Stylish, technical, comfortable
by James
Cycling Enthusiast
Seattle, WA
3 of 4 customers found this review helpful.

Very nicely made bibs, fabric feels good, and most importantly the chamois is very comfortable for longer rides. My only gripe is the leg grippers can make it hard to adjust the fit if your legs are on the thicker side. Sizing is as expected from Castelli, I ordered 2XL and I am 6'3" 220. Compared to other bibs, this feels a bit tight on the length, but I didn't think 3XL would solve that problem.

Reviewed 5/17/2021
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