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Assos Mens Mille GTS Bib Short Black Series
Assos Mens Mille GTS Bib Short Black Series
Assos Mens Mille GTS Bib Short Black Series
Assos Mens Mille GTS Bib Short
Black Series
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Assos Mens Mille GTS Bib Short 2
Assos Mens Mille GTS Bib Short 1
Assos Mens Mille GTS Bib Short 3
Assos Mens Mille GTS Bib Short 4

Assos Men's Mille GTS Bib Short

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(13 customer reviews)
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MSRP: $230.00
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The Next Generation of the MILLE Bib Shorts

GTS marks the introduction of the second generation of MILLE — an all-new bib short that builds on the iconic GT shorts Total Comfort formula with its plush double-layer insert, fatigue-reducing textile, and revamped fit. Ideal for pro riders looking for added comfort during training to everyday riders seeking maximum long-distance support.

ASSOS started by adapting the patterning of its S9 race shorts, using its two-panel "butterfly" lower to smoothly wrap your legs, lock the insert in place as you pedal, and reduce friction with its minimal seams. Above this, its Xbib straps feature calibrated stretch throughout, with the rear section using a single strap to form an A-frame for added stability.

The OSSIDIA textile's developed specifically for the MILLE GT c2 platform strikes the ideal balance between frictionless comfort and muscle-supporting compression. Its warp-knit composition is made with ultrathin, elastic yarns for muscle hold, breathability, and a silky-smooth wrap along your low back and thighs. The fit that results is a more responsive, compressive regularFit, ideal for a variety of body types and riding styles.

The heart of the GTS is an all-new insert, adapted from the GT using a double-layer memory foam construction and honeycomb top sheet. This multi-layered cushioning system provides targeted dual-density structural support for your sit bones, while the 3D top layer and kraterCooler ventilation holes increase breathability for added next-to-skin comfort.


  • OSSIDIA: A 40-gauge warp knit textile, developed for compressive hold and an ultrasoft feel against the skin. 195g/m2, UPF 50+, moisture-wicking, built-in minerals for odorControl, freshness & thermoregulation, and extremely durable.
  • GTS Insert: A new insert for the MILLE GT line featuring a double-layer, dual-density memory foam construction, and honeycomb topsheet tuned to ensure optimal support and breathability, especially during long rides.
  • 3D waffle: A patented, three-layer perforated foam that increases breathability and eliminates excess weight.
  • kraterCooler: System of small holes in the front of the insert that increases airflow so that your sensitive areas are kept cooler.
  • goldenGate: A patented tech feature that interrupts the stitching along both of the insert's side panels, allowing more three-dimensional freedom of movement in this sensitive, rotational area.
  • A-Lock Engineering: c2 regularFit system comprising new textiles and technologies that stabilize the shorts and secure the insert in place.
  • Butterfly Pattern: The primary textile panel fully wrapping the lower back and legs, coming together in the rear. Fewer seams leads to a more uniform hold, less weight, and greater comfort.
  • ergoBox: A square pattern construction that effectively frames the insert in the back, boxing it in for added stability.
  • zeroWaist: A raw-cut, tape-reinforced edge for the smoothest transition possible between the body and fabric panel. More comfort with less pressure.
  • regularFit: Optimized for total comfort in the riding position, with a more relaxed cut than the brand's second skin racingFit.
  • superFlat Xbib: A single section of elastic material folded over on itself forming a supportive A-frame that delivers limited vertical stretch in the rear.
  • ultraLight Leg Grippers: Minimal silicone treatment secures the shorts in place without any excessive pressure.

  • 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 Series - Small

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    Black Series - Medium

    Mfg PartNum: 

    Black Series - Large

    Mfg PartNum: 

    Black Series - X-Large

    Mfg PartNum: 

    Black Series - 2X-Large

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    Ordered by Most Relevant First
    5 stars
    4 stars
    3 stars
    2 stars
    1 stars
    Almost great
    by CH
    Vancouver, WA
    1 of 1 customers found this review helpful.

    I have stayed away from Assos for years because their S5 pads were bulky and not dense and after 30 miles, they were worthless. Now with the new denser, pads, I decided to give them another go. Unfortunately the legs are a bit shorter and the waist is cut lower so it pushes up my sides and looks terrible. Most bibs are coming up higher on the sides and longer in the legs. Assos, of course, is going in the opposite direction after they finally got a decent pad.

    The straps are great and lay flat and of course the fabrics are nice as well.

    Reviewed 7/4/2023
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    Very comfortable. moisture wicking, and looks great! Best Bib short I have owned
    by Anonymous
    Competitive Racer

    Assos really puts effort into their cycling kit. From the packaging unboxing to the performance of the bib shorts. Very comfortable, doesn't move. breathes, and looks great. Would def buy again when on sale. Expensive but worth it vs buying 2-3 cheap bib shorts.

    Reviewed 10/7/2023
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    Great, almost perfect bib shorts
    by Anonymous
    8 of 8 customers found this review helpful.

    I own a couple of mid-range Pearl Izumis, a pair of Castelli Free Aero Race 4s, and these. The Castellis are very good, but I like these a bit more. They have very different strengths and weaknesses.

    The best part of the Mille GTS shorts is the pad. It's quite thick, has a great shape, and provides room where needed. Importantly, it includes a cutout. A saddle cutout does nothing if you have a plywood pad and only provides a benefit if the pad complements it. These shorts let me sit a bit more aggressively without discomfort.

    My main complaint with the Castelli shorts is the lack of room up front. They are tight up there! The Assos shorts have a natural pocket that gives some room. It's like going from a studio apartment with no place to store your bike to a place with a proper garage.

    These shorts definitely provide compression on the thighs. I'm 6-2, 190 lbs. and I went with large size based on a previous review. They fit fine, but I might prefer XL for more comfort. I must be a tweener and got a race fit over a comfort fit. Choose up or down, depending on your goal.

    The materials are top notch and the leg grippers work well. (Same for the Castellis.) Where the two differ are the shape and straps. The Castelli straps are super light and attach close to one another at the waist. I find this comfortable. The Assos straps are heavier, stay perfectly flat, and fall wide down the torso. This is great if you don't want straps on the nipples. It's not as great at the waist. The waist cut is very straight and if the stomach has a natural fold, the top can be irritating. My solution is to always wear a base layer with them. I find it necessary with these, but not with my other bibs.

    One last negative. On my first ride, I had a touch of chafing at the very top of the inner thigh. Applying a bit more cream there solved it.

    Anyway, the pad is great, though it's so thick that it takes a bit long to dry. Oh well. The Castelli pad is a bit firmer and thinner and dries faster. With the cutout and bit of room up front, the Assos still wins.

    My perfect bib shorts would have the Castelli cut and the Assos pad. Given that the pad is the key to comfort and I can mitigate the cut with a base layer and a bit of cream, these are my clear choice - especially for longer rides. If the Castellis had a bit more room where it counts, they would take the prize. Until I find something better, I'd buy these again.

    Reviewed 5/28/2021
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    Good, but not as good as the previous generation from Assos
    by Anonymous
    Cycling Enthusiast
    Pacific NW

    These bib shorts are pretty comfortable, but not as good as the previous generation with the S7 chamois. The chamois on the Mille GTS is just not as good, yet plenty expensive. I wish I could still buy the bib with the S7 chamois.

    Reviewed 5/10/2023
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    Usual Assos excellence, not noticeably cool.
    by Anonymous
    Cycling Enthusiast
    North Carolina
    2 of 2 customers found this review helpful.

    I've used these shorts on several 75+ mile rides in temperatures ranging from the 60s to the 80s. They are comfortable, fit well, and provide good padding. I also have a pair of the more expensive Cento Evo. I like the Cento more. The Mille has a tighter fit with more compression, is not noticeably cooler, and has less sit bone padding than the Cento. If that's what you like, great. But for me it is only my second favorite pair of shorts. Still better than my Segoi shorts (my old favorites) but not as good as the Cento.

    Reviewed 6/18/2021
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    Great bibs
    by Brandon

    Great for long rides!

    Reviewed 6/5/2023
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    Great for long rides
    by Steve F.
    3 of 3 customers found this review helpful.

    Very well made as you might expect from Assos, this is the first pair of bibs I've gotten from them and they are as nice as I had hoped. The longest ride I've for so far is 68 miles and they stayed comfortable the whole time, the chamois feels strange when off the bike but once seated it pretty much disappears. There is a lot of material up front that takes some getting used to but it's nice to hide the junk from the public eye, no one really wants to see that if we're going to be honest. These don't stretch quite as much as other bibs so if your in between sizes or have big legs you might want to size up. These are expensive and really don't seem much more comfortable than Castelli's bibs but if they last a long time as other reviews I've read have mentioned then they are definitely worth it.

    Reviewed 5/20/2021
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    Comfortable Bib Shorts
    by MarkT
    Casual Cyclist
    Portland, OR
    7 of 7 customers found this review helpful.

    Very comfortable shorts. I'm 6'3" 180lbs, Large fits me great. The materials are top quality, slight compression on the legs, but very comfortable. Straps have enough stretch to keep things in place without feeling restrictive. I'm slightly taller than Assos recommend for Large, but have not had any issues. I've got an older pair of Assos bibs with the S7 pad which I'm a big fan of. The pad in these feels slightly denser, which I found more comfortable on the sit bones. Like the S9 pad, I'd still prefer slightly less material in the groin area. Best thing about Assos shorts is the pouch up front for your junk...keeps things nicely in place.

    Reviewed 3/25/2021
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    Highest quality bibs I have ever owned
    by Geofferson
    Cycling Enthusiast
    Lost Angeles, CA

    I wear these regularly. Most rides are around 2-3 hours. I have no complaints. I find the suspenders more comfortable than the overall style. The pad is plush. The fabric is super comfortable and the fit is functional. The price is high, but you get what you pay for.

    Reviewed 8/8/2022
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    Ul;timate comfort for 100+ mile rides
    by Sisyphus
    Cycling Enthusiast
    Amherst. MA
    1 of 1 customers found this review helpful.

    I didn't realize how important bibs are until I began doing rides in excess of 100 miles. I took a risk on this purchase with the hope that they would remain comfortable on rides exceeding 8 hours. They delivered. I am very happy with my purchase and recommend them if you sit in the saddle for many hours.

    Reviewed 7/25/2022
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    Excellent, by go-to bib!
    by Anonymous

    Excellent fit, materials, and comfort.

    Reviewed 6/13/2022
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    Perfect fit
    by Anonymous
    1 of 1 customers found this review helpful.

    These are the first bibs I've owned that felt great from the first ride.

    Reviewed 7/23/2021
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    excellent product fits to size
    by gary
    Cycling Enthusiast
    Boulder CO
    1 of 1 customers found this review helpful.

    very comfotatable high quality

    Reviewed 5/27/2021
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