Assos T Fi.13_S5 Bibs


I’d like to get one thing out of the way now, just so we’re clear, and because I don’t see drama as an option.

These are the finest bib shorts available. It’s not really up for discussion.

Some will complain about the price, and at $369, that’s a bunch of greenbacks out of your wallet in exchange for a single garment. I once spent roughly that for two jerseys, two bib shorts, arm warmers, a vest and a skinsuit. But that was 14 years ago and those bibs could do things to my undercarriage worthy of scenes in “50 Shades of Gray.” The rest of the pieces were all, at some level, rudimentary pieces no one would mention in a postcard home. Some will observe that at that price, they simply couldn’t afford even one new kit per year.

This is a crazy amount of money for a single pair of bibs; I know that.

I’m not going to suggest these are the bibs for you. If you have anything like a middle-class income and a marriage you want to last at least through the next presidency, ordering a pair of these could be a bad idea. Which is a shame, really.


Were this any one of the millions of gear-centric sites on the web, I could probably have concluded the review following the third sentence. But readers of RKP know I can’t shut up after only 50 words. Reviewing a piece of gear like this is half the fun of my job. This little exercise, which may seem like a paid-for advertisement for Assos, is really just an excuse for me to write about craft and the pursuit of excellence. I have a thing for folks who really walk the walk, especially when they are the CEO of the company. The Fi.13 bibs are the shorts that Roche Maier, Assos’ resident Don Quixote, wanted for himself.

I dig that.

So even if you know you’re not going to plunk down your lettuce on a pair of these bibs, here’s why you should keep reading: These bibs have a host of features you’d do well to look for in other, less expensive, bibs. You won’t find exactly the same features anywhere, but there are elements of these bibs that are going to gradually show up in other bibs as time does that little marchy thingy.

The crux of these bibs really comes down to the chamois. If there were only one feature that I were to focus on for Assos bibs as a whole, it would be their pads. The Uno pad is is amazing, better than most companies’ top-of-the-line units. But that’s only Assos’ entry-level product. The chamois in the Mille (say Mee-lay) is a rose among weeds, an Eames among toilets. It’s so fine that you can be forgiven for thinking no one could top it.

FIUno_S5the Uno pad

So what makes the Fi.13 chamois so special? Were I an employee of Assos, I’d give my patented, exasperated eye-roll. It’s the same eye roll that Aston Martin salesmen give. Where to begin…?

Well, now that I’ve danced around it a bit, I should mention the elephant in the room. Yes, that name. If you can call it that. The folks at Assos just refer to these as the eff-aye-dot-thirteen. Even they concede that to say tee-eff-aye-dot-thirteen-underscore-ess-five is in the next orbit beyond mouthful. It’s not even a term of art. It’s computer code, just minus the machine language. Now that I’ve dealt with what to call them (I mean, other than expensive), let’s consider the product itself.

p139_T_FI13_S5_cthe Fi.13 pad

Permit me a moment to talk about what you see at Interbike. That is, what you see at Interbike when you’re not at the Colnago booth, or the Campagnolo booth, or getting Mario Cipollini’s autograph or chatting up the models pouring espresso at the Marzocchi booth. There are apparel contractors at Interbike. These aren’t the apparel companies whose names appear on the tags of your team kit. These are the companies supplying textiles to the factories that actually make the clothing for companies like Hincapie, Capo and Sugoi. They usually occupy nondescript 10×10 booths and they’ll have a whole range of pads that you can select. One of the things I’ve seen repeatedly are pads that have been designed with little darts and tucks to make them conform to the shape of the shorts. The idea is that these adjustment will make them better follow the legs of the shorts, wrapping around the saddle more.

It’s not a bad line of thinking, but it is a wrong line of thinking.

Let’s think about what a pad really needs to do. It doesn’t need to conform to the saddle. It needs to conform to you. It needs to curve front to rear, effectively cradling you and your faucet. So what Assos did was start molding a pad not as a single, flat piece of padding, but in 3D, building the cradle into the pad. I’ve seen the Fi.13 pad on its own and it won’t lay flat. This curved construction has another excellent effect. The bunching up of material that can happen when a thick pad gets sewn into a curvy pair of cycling shorts doesn’t happen with these bibs. As a matter of fact, you can tell the Fi.13 bibs from anything else on the market because they hang weird. Unlike top bibs from every other company I can think of, the legs of the Fi.13s are held apart by the pad, like a ref between two angry ball players. This pad doesn’t have a crease to make the shorts lie flat on the drying rack.


That brings us to another point about this pad: It does not follow the example of so many other pads that use multiple thicknesses to create channels of reduced pressure. The interesting thing is how often these various channels end up working like hinge points, meaning the pad is more likely to bend there than at other points. The dimpled surface of the pad maintains a mostly uniform thickness across its surface, though it’s not perfectly consistent due to the aforementioned dimpling. That dimpling is meant to help with ventilation, to keep you drier on long days.

Back to the Mille pad for a second. That pad is designed specifically for riders who are apt to sit up a bit more and have more of their weight rest on their sit bones. That’s why the Mille pad is 10mm thick. If you’ve ever thought that maybe the Mille pad was a bit too thick, that might be why. The Fi.13 pad, by comparison, is meant for riders who rotate their hips and as a result have their weight spread over a broader area, and as a result is only 8mm thick.

Lest I give you the impression that the pad in the Fi.13s has a single, form-following curve, that’s not quite right. There’s actually a second curve to the front of the pad. Call it a pocket, if you will. The idea here is that it will cut pressure on your groceries. So while you don’t look so indelicate as a ballet dancer, there is definitely a pronounced bulge at the front of the bibs. It’s a sight that, in the mirror, is reassuring. I’ve always found it disconcerting the way so many shorts make a man look like a Ken doll below the waist.

So when I donned a pair of Fi.13s for the first time, I was immediately aware that I was wearing a garment meant for a specific duty. The molding of the pad is such that the bibs are pre-shaped to sit on a saddle. The very first time I pushed off, took a couple of pedal strokes and sat down I was struck by that extra ease I experienced in sitting down on exactly the right spot on the saddle. It wasn’t huge, but it was tangible.


Because these are Assos’ ne-plus-ultra shorts, they decided to spec a fabric on the inside of the thighs that stretches less than the material used elsewhere in the shorts, in order to move more naturally with you, while also offering increased durability as your legs rub that fabric against your saddle. That unusual stitching at the back of the pad is intended to allow more more independent cheek movement; it works. But don’t let little stitching touches throw you. This is a six-panel short. Stitching is kept to a minimum in order to keep you as comfortable as possible. The fact that this is a six-panel short makes me chuckle. I spent years in bike shops steering everyone to eight-panel shorts because they fit better than six-panel shorts. That was the pitch. Tonight, I fully expect to have a nightmare in which a pair of six-panel shorts walk up to me says, “How you like me now, bitch?!”

Compared to its predecessor (the S2), these bibs are supposed to be 20 percent lighter and offer 20 percent more muscle compression. I don’t know about you, but I’ve worn plenty of compression shorts that use materials like Power Lycra. While support seems like a really good idea, if a pair of shorts is too tight, I begin avoiding them. I’ve had the experience of looking into a drawer, seeing a particular pair of compression shorts and thinking, “Oh, no, I can’t wear the corset shorts today.”

I am quite definitely a freak, but I can’t be the only person who has ever thought that.

With the Fi.13 I get a certain amount of compression without feeling like I’m wearing the two-headed bastard sire of a tourniquet and a diaper. I mean, really, where’s the fun in that? A great pair of bibs shouldn’t require chamois cream for installation and ought to feel comfortable when you pull them on; medical devices are for the injured, right? Right.


Assos claims that these bibs are also 35 percent more breathable than their predecessors. Part of how they attempt to achieve that is by running the mesh used in the bibs right down into the crotch. I’ve no way to verify that number, but what I can tell you is this: In the hottest, sunniest weather I’ve experienced this year the Fi.13 has proven to be the pair of bibs that keep me driest. Maybe not perfectly dry, but drier than even some of the allegedly summer-leaning clothing I’ve tried this year. I’ll take it.

The Fi.13s are available in two colors, black and unforgivable—I mean black and white. I’ve yet to see anyone wear the white. If I had half the charisma of Mario Cipollini, I’d give ’em a try, but I don’t, so like all the intelligent people I know, I’ll stick with black. They also come in six sizes: small, medium, large XL, XXL and TIR. (For folks who haven’t been to Switzerland, that’s a little joke; “TIR” is what the Swiss put on the back of a truck to indicate a wide load.) I’m about 160 lbs. and wear the large.

I’m going to add a little testimonial to this review. This spring I decided it was time to make sure that my family of four remained a family of four, if you get my drift. There was a consultation, a needle, some tugging, a bit of smoke and some time off the bike. In my first attempts to return to the bike I noticed a curious affinity. Those first rides demanded everything be situated just-s0. On my first three rides, the only shorts that made riding possible were the Fi.13s. Mind you, this was following a 12-day wait. I took my time. There was one day where I wanted to ride, but the Fi.13s were on the drying rack, so I pulled out every other pair of bibs I owned and kept trying to see if something else could provide not the same comfort, but just adequate comfort. I was only seeking enough comfort to enable me to ride for an hour. It didn’t happen. I didn’t comfort. I didn’t ride. I didn’t happy.

These happy.

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  1. Gowers

    Ha, ha. I had a similar experience with the Uno shorts recently. Having ridden day in day out for years I’ve just had 3 month off the bike. I went on the turbo a couple of times before venturing outside at the weekend to get my bearings again but no matter how much chamois cream I put on the family jewels wouldn’t tolerate anything other than Assos shorts. Not Rapha, Castelli or PI. Only the S5 padding worked for me. Before anyone says anything I have definitely spent way too much money on shorts over the years. I value my undercarriage.

    1. Author

      I think it’s fair to ask, if your undercarriage is happy, how can you have spent too much? I am very clear on those occasions when I spent too little.

  2. Gowers

    Your right Padraig. I just find comments sections often go in to meltdown when anyone admits to owning eg Assos kit even though they themselves might own a bike that has previously been seen underneath a TdF winner and costs thousands. Cost vs. VFM – the eternal cycling debate. I am crap but train pretty hard (when work doesn’t get in the way) so it’s VFM all the way for me. I find Assos shorts and many of their jackets to be VFM even though they cost a serious amount of money.

  3. Scott

    Back in the 80’s through the mid 90’s I rode nothing but Assos. Leather chamois first then the early synthetic. I was lucky that a buddy could hook me up wholesale or there was no way I could have afforded them. Even back then the chamois was great. But the real story was the lycra. Great compression great fit and it never wore out. I mean never. Hit the deck and slide, no problem. 10,000K, no problem. I replaced the chamois twice on 2 pair until Assos stopped doing it. Then I tried a new pair. Paid full pop. Can’t remember the year but it was the Elastic interface chamois and the top end bib. Felt great! The lycra wore out in less than a season. I understand that breathable is good, but if you plunk down the kind of green Assos commands it better last. Not sure what the lycra blend is they are currently using but unless it can outlast the chamois, I’ll pass.

  4. Jan

    Do you have a reviewer for women’s shorts? I’d love to be able to find reviews this good for women’s shorts…


  5. Todd

    Having come into a little bit of extra money this spring, I picked up a pair of the Assos Unos. Unfortunately, I’ve been disappointed in them considering the cost. They are essentially no different comfort-wise than the $80 Performance Bike Ultra’s I bought a few years ago.

  6. Gary

    No doubt they’re good bibs, for the price, you’d expect that. Like many things “high end”, the price/performance ratio doesn’t translate from $100 or even $200, i.e. not 2x or 3x “better”. But many that purchase such items aren’t necessarily looking for a value ratio, they’re looking for the best.

    I owned 3 pairs of the S2’s and while the fit etc were good, they lycra disappeared into nearly worn through in a year in all cases. I bought a pair of S5 Uno’s since the price was now the same as the S2’s were, the lycra didn’t last that much longer.

    So, not saying they’re not great bibs but longevity may not be the most optimized vector relative to the price.

    1. Author

      I’m surprised to hear people report issues with the durability of Assos bibs. I’ve been wearing these for eight months, and wearing them as often as possible, and they show no signs of wear. My Milles are more than two years old and they show no signs of wear either.

  7. Bikelink

    I have a pair of the Unos and Mille…I have also done the shuffling through my shorts disappointed if they are in the wash since my undercarriage likes both of them better than anything else (including castelli with their best chamois). Probably the Unos are a good “gateway” towards buying more Assos stuff…plunk down the $200 and most (though not all, as one commenter notes) will say “wow those are great. I like lots of padding but your comment on the mille is interesting it’s a tad too much for me vs. the Unos.

    Separate issue but I find the whole compression thing in shorts bizarre. What little data there is for compression doesn’t include shorts (that I’m aware of), and for whatever compression shorts do give you’d then expect to get swelling in your legs below that level of compression. The Unos have a firm/nice fit that make me feel secure…I think they use the word “compression” since that’s like “vertically compliant …” for frames, though isn’t actually a true compressive (large pressure) garment.

  8. Andrew

    I cannot imagine a universe in which purchasing $370 bib shorts would not result in the rest of my possessions being put out on the front porch.

  9. Gowers

    Guys/Girls you can get Assos shorts for about $120 through their factory outlet store. Not the FI-13s I know but no one’s going to be hitting the divorce courts. However, if I see anyone in a pair of their yellow shorts I will refuse to acknowledge any blame!

  10. Jonathan Puskas

    My team set the 8-person World Record at the Race Across America used UNO shorts (and I used a personal pair of Mille).

    This is without a doubt the finest clothing on the market.

    I’m afraid to try the top-end version as I may never be able to go back to anything else.

  11. Saronni

    i gota pair of unos in 2011. Just this year the lycra is starting to wear out. Keep in mind these were my only pair of shorts and i ride a little under 5K a year. I think what helped is that I washed them in the shower after a ride with a little bit of anti bacterial soap. I would just ring them out and put them on a hanger to dry and that was it. The only tome i regretted paying that much for bibs was the day i bought them. I got some vermarc team bibs this year and i hate them

  12. Atganirider

    I always find it amusing when discussing Assos kit with another rider to discover that I have kit older than they are!

    Choose the colour carefully, as it’s going to last a long, long time, providing that you don’t use fabric softener or bio detergent – guaranteed to kill you Lycra!

  13. LesB

    “I’ve always found it disconcerting the way so many shorts make a man look like a Ken doll below the waist.”

    It never occurred to me as this being a factor in getting shorts.
    You certainly do a thorough review, Patrick.

  14. Bill

    Just a note that you can obtain these shorts from Ribble when they go on sale for the price of Unos from your LBS. I know, support your LBS, but when I can buy these shorts for $205 (vs $370) how can I NOT take advantage of that kind of pricing? Waiting for the not infrequent sales always pays off when it comes to Assos!

  15. Steve

    A man’s backside is his castle!
    I have two pair that are over three years old, use them every week, year round.
    Money well spent. Those of you that debate this have never tried them.
    F’n Steve

  16. Rick

    I ordered the FI.13 bibs based on their stellar reviews. Ribble has them on sale for $200. Also ordered the new Equipe bibs from Belatti for $180. Can hardly wait to try and compare them.

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