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AssosBonka Evo Bib Tight - Men's

Sale 31% OffCurrent price:$304.99 Original price:$439.00

Item # AAS00CR

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Item # AAS00CR

Bonka Evo Bib Tight

Switzerland is known for its chocolate, alpine villages, and, if you're a roadie like us, its elite level cycling clothing brand, Assos. And with the high altitudes, snow flurries, and chilly winter temperatures, it should come as no surprise that Assos has a penchant for tackling winter cycling gear that can hold up to the harshest riding conditions that cross the Alps. For years we've been graced with the LL.BonkaTights from Assos, which did a great job of answering our frosty winter demands, but this year Assos is ready to launch into the frost with the new Bonka Evo Bib Tights that feature evolved fabrics for ultimate protection from the cold, while maintaining the signature fit, sharp aesthetic, and supportive compression we've seen in years past.

The new Bonka Evo Bibs are built from Assos' arsenal of winter-proven textiles. Against the skin they feature RX Heavy — a brushed, warp-knit fabric that's developed to wick moisture, insulate, and remain fully flexible for comfortable movement in the saddle. On top of the RX Heavy, Assos employs a two-layer windproof Stratagon Ultra softshell at the knees, thighs, and hips to ward off of the elements, slicing the wind, shedding rain, and keeping you dry with exceptional breathability properties, aiming to keep the front half of your body fully protected as it faces the harsh weather ahead. And while keeping your front half as shielded as possible is a priority, the back zone is best optimized for breathability, as it doesn't have to face the elements head-on. For this very reason, Assos utilizes RX Light fabric to the back of the legs. RX Light offers superior flexibility to its heavier partner, making it ideal for wrapping your gluts and hamstrings that flex and move continuously while you pedal.

To finish off the technology laden fabrics, Assos uses blasenSchutz, German for wind protection, to the abdomen and crotch for added warmth and protection at the core, and waterBarrier panels at the bottom of the leg for added insurance against storms, and a tight seal against your booties.

But if we know Assos well, and we certainly have a deep familiarity with the product, we'd also know that fabrics aren't everything with the brand. Fit matters, too. The attention to fit-related details is evident with features like the articulation down the back of the leg. Assos combines strategically tapered panels of material for a fit through the back of the knee that is every bit as bunch-free as riding with bare knees. Even the reflective strips at the back of the legs are only attached at the ends, as sewing the entire length to the tights would compromise fit and stretch of the fabric.

The Bonka Evo bib tights are finished off with the Cento Evo chamois. The new sleek black insert uses 10mm of plush memory foam and the kukuPenthouse for comfort and support on every ride. kukuPenthouse is a soft, brushed microfiber layer at the front part of the insert that supports male anatomy, and eliminates pressure while improving ventilation. Its patented 3D waffle design uses three-layer perforated foam that increases breathability while dropping excessive grams to keep things feeling light. Finally, the returning goldenGate technology is always welcome to see, and features interrupted stitched along the insert's side panels, allowing for three-dimensional freedom of movement in a sensitive, high-rotational area.

  • Assos' winter bib gets updated for superior elemental protection
  • New 2L Stratagon Ultra softshell front stretches, shields wind and rain
  • RX fabrics offer thermal insulation and accommodating stretch
  • Weatherproof membrane and Geoprene at cuff seals tight to booties
  • blasenSchutz at core and crotch for added wind and cold protection
  • Cento Evo chamois offer 10mm of plush memory foam with 3D waffle technology
  • kukuPenthouse is ultra-comfortable against sensitive male anatomy
  • Bib design uses a wider cut of elastic for less pressure on shoulders

Tech Specs
Material[face fabric] RX Heavy, DWR treated [thigh, knee] Stratagon Ultra, [abdomen, crotch] blasenSchutz, [back thigh, calf] RX Light, [ankle] waterBarrier
ChamoisCento S7 Evo
BibY7 Frame Carrier Bib Tech, Stabilizer V3 panel
Reflectivebands on back of calf
Recommended Useroad cycling
Manufacturer Warrantylimited


Men's Apparel
Leg, Knee, Arm Warmers0III 

5ft 3in - 5ft 7in

(160 - 170cm)

5ft 7in - 5ft 9in

(168 - 175cm)

5ft 8in - 5ft 11in

(170 - 179cm)

5ft 11in - 6ft 2in

(180 - 187cm)

6ft 1in - 6ft 2in

(185 - 189cm)

6ft 3in+



< 132lb

(< 60kg)

< 154lb

(< 70kg)

< 165lb

(< 75kg)

< 176lb

(< 80kg)

< 187lb

(< 85kg)

< 198lb

(< 90lb)

> 198lb

(> 90lb)


27.5 - 29.1in

(70 - 74cm)

29.2 - 31.5in

(75 - 80cm)

31.6 - 33.8in

(81 - 86cm)

33.8 - 36.2in

(87 - 92cm)

36.3 - 38.9in

(93 - 99cm)

39 - 41.7in

(100 - 106cm)


















Note: Assos clothing has a very slimming, anatomic cut, if your build is less than slim or if you like your fit looser, go up in size.

How to Measure:
For best results, take measurements over your underwear.
Measure around the widest part of your chest.
Bend to the side and measure around the place where your waist bends, keeping the tape a bit loose.

What do you think about this product?


>Rating: 1

Failure for the first time in 40 years!

I've used it several times
True to size
Size Bought
6` 2"
172 lbs

I have been buying Assos cycling clothing since the 1980's, so I was shocked when my winter tights got a fluffy spot on the seat after the second time I wore them. I checked the saddle and it is as smooth as ever... the rough patch turned into a hole after a couple of outings and that has grown bigger after a few more rides. Competitive Cyclist's comment on my warranty request for a $439 pair of tights: "wear and tear from a saddle is not considered a defect in materials". So I guess I won't be shopping here again.

It’s a bit of a hassle but you could reach out to Assos customer service through their web site and see if they will repair them. I had a low speed crash with my Bonkas which left a small hole on one leg. It was outside the crash warranty period but Assos repaired the bibs by replacing the torn panel for around $60. I had to pay to ship them to Switzerland but they were lightly used and I felt worth it to get them repaired good as new.

>Rating: 5

Absolutely worth it!

I've put it through the wringer
True to size
Size Bought
5` 10"
170 lbs

Until I experienced it, I thought Assos' KuKu Penthouse chamois was ridiculous. Not any more! I tried Castelli Sorpasso Wind bib tights: L was too snug Down There, and with XL things flopped around. I am M in Assos bib shorts, and these in M fit me perfectly. So far they have kept me warm down to 26F (at least according to the thermometer built into the Garmin 1030) and are probably good even lower. Today the Garmin said 31F when I started and 42F when I got home, and I was completely comfortable. Haven't explored the upper temp limit yet, I suspect it's 50F-ish. Putting them on is a bit of a project. They fit snugly, and the neoprene at the bottom of the legs (no zippers) complicates matters. Putting your socks on first helps. Beware: the reflective flashes on the legs are perfectly located to be finger pulls and are easily mistaken for them (the bottom edges are not stitched to the legging fabric). It would be a great update for Assos to reinforce them so they would be dual purpose reflective accent + finger pull. It's slightly comforting that you need only one set if you wash them after every ride, which is wise.

>Rating: 5

Worth the extra spend

I've put it through the wringer
True to size

Have these Bonkas and also Assos' other winter tights, the Mille GTs, which cost half as much. Both are warm, although the Bonkas are warmer. For rides of 30 miles or less, either does fine. Beyond that, the chamois in the Bonkas is FAR superior to the Mille GT. You get what you pay for. The Bonka, IMO, is worth it for the incredible comfort on long rides and in low temps.

>Rating: 5

Continued excellence from Assos

True to size
Size Bought
5` 10"
190 lbs

I have been a loyal Assos customer for over 20 years. I find their products are extremely comfortable and last for a long time which helps justify the extra costs. I am a casual, older rider but try to push myself on every ride and like to have the best gear possible. I needed to replace my 10 year old Castelli winter tights and with a gear head recommendation, just bought this product. It was a cold, rainy day to ride and it was a perfect test for the tights. They were not only warm but I really appreciated the neoprene type material at the bottom of the tights that helped keep me dry as well. Another great product from Assos.

>Rating: 5

Assos Bonka Bib Tights

I've put it through the wringer
True to size
Size Bought
5` 7"
163 lbs

I have worn these tights estimated - over the past year - on the road more than 1000 miles and they work very well. They shelter my legs from the cold wind and the pad is very comfortable. I generally wear them when the temperature is anywhere from 25-50 degrees. They sure have been durable too which is essential given their price. I also like the water barrier panels at the bottom of each leg which assist with road spray. I have been very happy with these bibs.

>Rating: 5


True to size

These bibs are very well made, warm, and comfortable. I have worn them in 30 deg F temps paired with the Bonka jacket and they are perfect. Highly recommend. I normally wear a large in all Assos bibs and these fit perfect.

>Rating: 5

Warm without the bulk

I've used it several times
True to size
175 lbs

I like to ride early AM , even in the winter. It can drop to mid 20s in high desert (arizona). The Bonka bibs fit great, not bulky and kep a perfect body temp even in the 20s. I was warning an Assos Bonka Jacket and Assos 6/7 under layer. Great gear for cold months