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Assos Equipe RS Bib Shorts S9 - Men's


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    12 Reviews


    Equipe RS Bib Shorts S9

    Never one to rest on its laurels, Assos put in six years of research and development, creating the Equipe RS Bib Shorts S9, a very worthy successor to its popular S7 shorts. Using its most advanced race insert to date, and a host of new features throughout, the S9 promises to be a comfortable pair of bibs that will keep you feeling great on your longest, most difficult rides. This all-new design was honed and tested not only by its in-house riders, but the BMC World Tour team also had a heavy influence in its design.

    Perhaps the most scrutinized component of any cycling shorts is the chamois and Assos paid careful attention when designing this race-specific insert constructed of 3D Basalt. First up, it's now grey instead of the previous amethyst. One big goal was reducing its bulk by shedding excess volume and grams over the previous S7 chamois. It now feels much thinner between the fingers versus the S7 insert, yet it somehow improves comfort and remains so even after many hours in the saddle. The padding consists of superAir microShock foam helping to absorb road vibrations thanks to its ultralight open cell foam. Up front, kraterCooler ventilation holes help to increase airflow and offer much-needed cooling while the 3D Waffle three-layer composition further aids in breathability. The middle section of the insert receives Assos' much-lauded GoldenGate technology which essentially eliminates stitching the chamois to the short allowing it to more easily move with you for more comfortable pedaling. Final chamois details include its Horizontal Stabilizer that locks the insert to the outer textile with a reinforced central stitch. Bottom line, the S7 insert was already one of our favorites and these new updates take the S9 over the top.

    Up top, the shorts see a total redesign there as well and now feature a detail that Assos is calling A-Lock Engineering. It’s a totally new way of attaching the Carbon Xbib straps to the shorts using advanced textiles and bracing technologies that aim to better stabilize and secure the insert as you pedal. The straps themselves are a single section of elastic material which is folded over on itself and forms a supportive A-frame with its tuned vertical elasticity. Furthermore, the straps crisscross at the back and anchor in place while in the front they're placed in a wide stance to sit comfortably and help minimize irritation.

    The construction of the lowers consists of just two panels, one for the lower back and one for the legs. It connects using a butterfly panel that wraps the legs and meets at the rear ergoBox, a square pattern construction that frames the insert at the back, boxing it in for added stability. This yields a consistent and uniform hold while dropping the overall weight. Furthermore, it allows for 30% fewer seams creating a very lightweight short that simply fits better.

    Lastly, there are two versions of the S9, the more affordable RS we have here, placing an emphasis on total comfort and support and uses its rollBar technology of bib strap bracing to secure the insert, ensuring it stays in place in or out of the saddle, and the RSR for the more weight conscious that foregoes the rollBar to keep weight to a minimum. Additionally, the RS uses Assos' Type.441 material offering a moderately compressive warp knit for support, second-skin fit, and ultimate durability, where the RSR uses its superlight woven with high elasticity Type.701kompressor for higher compression, better aerodynamics, and a snug fit.

    • Assos latest shorts with a new insert and bib strap construction
    • Type.441 material offers compression, stretch, and breathability
    • A-Lock Engineering stabilizes the shorts and secures everything in place
    • Equipe RS Insert offers a streamlined race platform with less buck
    • The single panel on the lower back and legs delivers a uniform hold
    • rollBar bib-strap bracing design secures the insert
    • ergoBox square pattern construction frames the insert for added stability
    • Carbon Xbib straps utilize a single section of elastic material forming a supportive A-frame with tuned vertical elasticity
    • Item #AAS00B3

    Tech Specs

    80% nylon, 20% elastane
    Equipe RS
    Carbon Xbib
    Recommended Use
    road cycling
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Best Bibs I've Owned

    • Familiarity: I've put it through the wringer

    After using these bibs through the summer, I have to say I'm shocked by the sub-5-star reviews. From fast 25-milers to longer rides, these are the most comfortable bibs I've ever used. The high quality chamois makes me disappointed every time I put on other bibs. Regarding the length, they seem in line with all other bibs I've worn, although I wouldn't mind if they were shorter. Cyclists complaining about showing too much leg is like a bodybuilder worried about showing off too much bicep. Recently pulled the trigger on a pair of Assos winter bibs. I know I'll love them if they are half as good as these.

    OK, but not what I expected.

    • Familiarity: I've used it several times
    • Fit: Runs small
    • Size Bought: Medium
    • Height: 5'8"
    • Weight: 160lbs

    So I finally sprung for some Assos bibs, after many years of seeing their ads, etc.

    Like the compression.
    Love those anchor point for the bib straps. Just feels right.
    low cut in front where you don't need too much fabric.
    Pad just attached in front and back makes sense - quick drying, etc.

    Not so Good;
    Don't like the 'anatomical cup' feature.
    Pad tends to bunch on the sides, so watch for chafing.
    Concerned with premature wear. The bottom compression strip is already showing some wear, and I've worn these maybe 12-14 times.

    Bottom line
    As others noted, given the hype, I expected more. My conclusion is that if I'm going to spend a lot of money on the next pair of bibs, I'll try another brand. My Louis Garneau team shorts, which were well under $100. (part of custom club order), look pretty strong in comparison and keep going for several years.

    Sizing - Medium is my size primarily due to length - I have short legs. They are quite tight in the legs, but that's ok and I have quite large thighs.


    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Medium
    • Height: 5'7"
    • Weight: 140lbs

    Unfortunately, initial reviews I read did not provide for me the exceptional fit I was expecting! Way too much chamois pad material. Serious bunching and discomfort. Not what I expected from all the hype! Perhaps I should have read between the lines “massive upgrade”!

    Returned for S7

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: XLG
    • Height: 6'1"
    • Weight: 190lbs

    Had a pair of S7s already, wanted to try S9. S9 has to much fabric in crotch area, bunches up and causes, rubbing, chafing. Returned S9 for another pair of S7s
    Wanted to love the S9 like the S7 but not comfortable. Will stick to S7s kuKuPenthouse for the goods.

    Perfect Bibs?

    • Familiarity: I've used it several times
    • Fit: True to size

    I have the S7 Cento which I thought were good, but they were too short and didn’t have enough compression. I bought these and they addressed both issues. Great compression, much longer down the thigh, and even though they don’t have the Kuku Penthouse, the new area in the front is extremely comfortable - better than the Kuku in my opinion. I’ll be buying many more pairs.

    Good but not good enough

    • Fit: True to size

    Ive always wanted to try Assos and compare it to my Rapha kits. the fit on the Assos gear is good but the Pad could not compare to Rapha. as bad as i wanted it to be better it was NOT.

    Finally off my bucket list

    • Familiarity: I've put it through the wringer
    • Fit: True to size

    I've been meaning to bite the bullet and try a pair of the famed Assos bibs for some many years now. With the release of these S9's I thought it was high time. And after four rides I'm disappointed. Many of the lauded features of the Assos bib are no less impressive than the marketing department claims. The way the panels are cut makes for a comfortable bib. The fit in a traditional road racing position feels great for strenuous efforts while climbing, in the drops, or just easy spinning on the hoods. And everything they say about the insert is nothing of an exaggeration. It's that good (in my opinion).
    But the legs are too short, and the grippers are not very effective. The bibs ride right up my thighs, and I've spent a lot of time on these four rides tugging them back down into a comfortable position. The compression is good. But it doesn't keep things in place.
    The verbiage in the package says the bibs are rated UPF 50+. Well, what good is that if they rest half way up your thigh? And the marketing specs also tout the compression. It's good. But what good is it if only the upper half of your leg is compressed?
    The gripper doesn't use a silicon treatment to stick to the skin. Maybe there's some health advantage there. Or weight? I don't know. But the Lycra/elastane doesn't really want to stay over the head of my leg muscles. When I begin to sweat it seems to get a little better. But I also feel some mild bunching in the crotch when they do ride upwards.
    This has to be mentioned, though: "MOD.DEP S9 BASALT Antibacterial microfiber booster top sheet in 3D basalt colorway. Pays homage to the lava stone that gives us strength, stability, and courage.” How cool is that?

    Long-term update: After some substantial mileage, I still like the cup up front and the chamois in general. But the leg grippers still don't stay in place; the bibs bunch up in the crotch and begin to chafe the groin area; the strap system seems like a gimmick. As others have concluded, Assos seems to have stepped in it for this iteration of bibs.

    Massive upgrade from my '07 Assos Mille

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Large
    • Height: 6'0"
    • Weight: 165lbs

    I've been riding two pairs of Assos Mille bibs for over 10 years, and only recently did one start to fall apart (became ...erm, transparent). That's a bonkers lifespan for clothes, especially exercise, so naturally I went with Assos again.

    This time, I decided to go with an upgrade set of kit and I'm glad I did. These feel amazing and the ventilated pad is something I didn't realize I wanted until I was wearing it on a warm spring day. I've returned to buy a second pair, and decided to write a review at the same time.

    I'm 6' 165 lbs, 32" inseam and bought large. They fit like a glove -- _so_ extremely comfortable. My old shorts are large too, and I feel like I had to "grow into them" a bit in the legs but definitely not the length (felt a little short in the shoulder to groin, frankly). These, not so much...they're perfect.

    Assos S9

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: Medium
    • Height: 6'0"
    • Weight: 145lbs

    Assos came through for all the step children out there with their new chamois courtesy of this incredible bib short. Thank you Assos! The input BMC gave towards the design upgrades was priceless. Their size Medium fits like a glove on a 31" waist, 34" inseam, 6' frame. I am in love again. If you are familiar with the reliable/outstanding performance of their Equipe S7 bib short on day long rides, you will recognize this bib short sets a new standard for BFF.

    Better than S7

    • Familiarity: I've used it once or twice and have initial impressions
    • Fit: Runs small
    • Size Bought: XL (usually purchase L
    • Height: 5'10"
    • Weight: 209lbs

    Just purchased this bib shorts, and ... it improves upon the previous generation S7.
    Long time Assos buyer and only ride Assos... expensive but worth it. I was not a fan of the S7 generation, I actually preferred the older S5 bib shorts, and was never fully satisfied with the S7, so I was hesitant about the new RS S9 bib shorts, but this was un justified, as Assos improved upon the S7 and has again great bib shorts, and I am reconciled with Assos bib shorts (although I still love the old S5).
    One caution on the new generation is that they run small. I have L on both S5 and S7 generation, but the L on the RS S9 was too small, and I had to order the XL instead, and this fits like the L on the S5 generation.
    Nevertheless, very happy with my purchase !

    If it ain't broke... still fix it.

    • Familiarity: I've used it once or twice and have initial impressions

    Assos probably didn't need to release a new bib short; their S7 series pieces still rule the market.

    Fortunately, that's not how Assos rolls.

    To preface, I only have initial impressions of the S9, but they are extremely positive. A few callouts:

    -These feel slightly more compressive than my Equipe S7 bibs. The RSRs (the higher-end piece) are supposed to be even more so.

    -Assos eliminated the hard seam across the stomach, and replaced it with a yoga-pants-esq band. This point might sound insignificant, but I can attest to the dramatic increase in comfort when you're in the riding position. No red marks from hard seams!

    -The chamois has changed slightly. It's thinner than any of the S7 series chamois, but it actually feels more comfortable to me on the bike. They also eliminated the kukuPenthouse cutout found on the chamois of the Cento and Campionissimo shorts, and replaced it with what they're calling the kraterCooler. Essentially, the material is slightly thinner, and the chamois features some perforation. A win in my book!

    -Size-wise, I was a medium in the Equipe, and the medium feels spot on in the RS. Do be aware of the aforementioned increase in compression. If you're new to the Assos brand, they generally run slightly smaller than Pearl Izumi, but slightly larger than Castelli in my experience.

    -Finally, the straps. I've heard more than one voice raised in concern, or at least, in confusion in regards to the new 'Roll Bar" design. Essentially, the straps extend all the way to the chamois.

    I'm calling it out as the biggest plus on the new RS shorts.

    When you stand, it definitely feels different. The straps tense up, and suspend themselves a inch or so off your back. Once you're in the riding position, they adhere to your figure perfectly, and pull the chamois up into the perfect position. I wouldn't be surprised to see other brands steal... *ahem*.... explore this technology in the near future.

    So, in short, I think Assos have hit it out of the park. These are going to be the next big player in the bib scene.

    Stay tuned for more updates, and as always, feel free to reach out to me directly at if you want to speak in more detail!

    Per Joe M. below, what's the leg length situation on these? Been wearing Assos for years - the comfort is absolutely worth the $ - but they've gone very short in leg length; to the point where I have a really hard time buying more of them. Was hoping 2019 would bring the return of a long-leg cut: What's the official take on this? Thanks!

    Joe and Blaine,

    Thanks so much for asking! We're waiting on official inseam numbers from Assos. In my experience, they've seemed to be cut very similarly to the S7 series bibs. I'll be sure to post inseam length numbers as soon as they become available!

    Feel free to reach out to me directly at if you would like to speak in more detail.


    Excellent review Drape!! You have not steered me wrong on anything in the past So I am sure this review is spot on. Would like be to hear about the inseam (comparable to castelli...only other brand I own). In castelli I am a xxl and ASsos is recommending a L for my 5’11” height. Keep up the great work, Joe

    To Mike Bart: I'm about your size and I have multiple pairs of S5 and S7 bibs in size L. I'm 5'11", 200 lbs with big legs and the S7 in Large give a little compression in the thighs, but not uncomfortably tight. The S7 are the most comfortable bibs I have by far, so I also got the S7 Evo and S7 Tiburu knickers and shorts. The Tiburu definitely have more compression to them than the Equipe.

    In the past when I wore Castelli, XLs were like skin tight on me, so I probably should have sized up to XXL. Now I'll only buy Assos bibs.