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Insider Bib Short - Men's

4 out of 5 stars
5 Reviews
Current price: $83.99 Original price: $139.99
40% off


Size Chart


Insider Bib Short - Men's


  • Cycling bib shorts specifically designed for indoor training
  • Inferno fabric works hard to keep you cool and dry
  • Form-fitting cut hugs the body for the perfect fit
  • Reinforced panel in saddle area for extra durability
  • Minimalist mesh bib straps stay cool and comfortable
  • KISS Air2 chamois cushions sit bones without excess bulk
  • Giro Air mesh leg endings secure the fit without pinching
  • Pro pocket on back for energy gels and other snacks
  • Item #CST00U3
minimalist mesh
Leg Gripper
Giro Air mesh
Claimed Weight
Manufacturer Warranty
1 year

Overall Rating

4 based on 5 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 1 reviews
3 Stars - 0 reviews
4 Stars - 2 reviews
5 Stars - 2 reviews

Fits Small

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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2 out of 5 stars

April 6, 2023

Fell apart after a few washes

I've put it through the wringer
Size Bought:

They run a bit small, but the bigger issue is that the bibs seem to fall apart after 4 or 5 washes. Specifically, the chamois seems to just fall off.

thomas m
4 out of 5 stars

April 7, 2022

Definitely size up!

I've used it several times
Size Bought:
6' 2"

As others have stated, these run small. How small? Well, small enough that even the XL gave me a hot spot in an exceptionally unpleasant place- something that has never happened to me before in 20+ years of cycling and numerous team kits and individual purchase bibs. It only happened once so maybe something was stuck to the chamois. I wish the straps were a bit longer, a little less tug on the crotch when not riding would be nice. It isn't noticeable on the bike and we all know not to sit around in sweaty shorts. I am 6' 2" and a lean 170-180 pounds, waist above hips is ~34" and hips ~38".

e-rp824770 e
5 out of 5 stars

November 26, 2021

An indoor favorite, careful of sizing

I've put it through the wringer
Size Bought:
5' 11"

Estimated use thus far: 125 indoor sessions lasting 30 to 45 minutes. Padding is appropriate, not too much, not too little. Quality is, as one would expect from this manufacturer, excellent. A bit thin. For me, this is desirable. I run hot, so anything to help me stay cool is a positive for me. I understand that these are meant to skin tight but as others have mentioned, and in my opinion, these run small. Given my size and weight I could not fit into a Large. I would describe it this way: if these were any smaller (or I was any larger) these would not fit. Would I buy them again? Yes.

Gerald B
5 out of 5 stars

June 17, 2021

Excellent product - careful with sizing

I've used it several times

The 1st premium bib shorts I've owned. I forget how good they are (fit, feel, support, etc.) until I put another pair of bib shorts on. I've worn them for more than 1.5 hour long sessions on the trainer and they were far more comfortable than any of my other low end shorts. I'm now convinced you do get what you pay for in cycling shorts. Similar to other reviews elsewhere, they tend to run small. I ended up sizing up 2 sizes to XXL (5'9" / 170 lbs) for overall comfort. I would definitely buy again.

Jeff C

Originally reviewed on Backcountry.com

4 out of 5 stars

December 29, 2020

Excellent but on small side

I've used it several times
Size Bought:
6' 1"

First time buying Castelli bib shorts, I normally wear size Large in LeCol & Rapha, charts looked like Castelli would be similar in fit. Large works, but is a little on the small side. Would probably try sizing up next time around. Excellent quality otherwise, comfortable and breaths well for indoor training.

kurt c