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AssosTrail Liner Bib Short - Men's


Item # AASZ00Z

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  • blackSeries, L ($169.00)
  • blackSeries, M ($169.00)
  • blackSeries, TIR ($169.00)
  • blackSeries, XL ($169.00)
  • blackSeries, XLG ($169.00)
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Item # AASZ00Z

Trail Liner Bib Short

Focusing on rider comfort and protection, Assos' Trail Liner Bib Short checks all the boxes on performance-readiness for epic trail sessions. Designed to be worn under Assos's TRAIL Cargo short —but fitting under most trail baggies — the Liner Bib's Aerofit fabric seems rather ironic, however, its ventilation and high-stretch make it ideal for your flat-out trail sessions. Stow your provisions securely in the mesh Ramp Pockets that combat heat buildup and are also positioned high enough on the bibs to avoid sharing space with your outer-short's waistband. Deep breathing on the climbs, you'll likely appreciate the AZPtech waist construction that supports heavy movement without pinching.

Assos uses removable impactPads that are 8mm thick for added protection during flat-out practice sessions or if you don't quite know the route you're taking. Underneath is Assos' OFF-ROAD Liner EVO Insert variable density chamois that targets thickness at the rear, which they feel more appropriately accommodates up-right mountain bike riding positions. And silicone-free leg grippers hold tight while you focus on the ride.

  • Lightweight, trail-ready liner for all-mountain sessions
  • Aerofit warp-knit for ventilation and comfort
  • Removable impact padding for skills-practice sessions
  • Ventilated rear panel with secure pockets
  • Variable density chamois for ideal comfort
  • Designed to be used with Assos TRAIL Cargo Shorts

Tech Specs
Material[face fabric] Aerofit (61% polyamide, 21% polyester, 18% elastane), [waist] AZPtech, [dorsal] Stabilizator V3
ChamoisOFF-ROAD Liner Evo Insert
Pockets2 Ramp (textile-lidded)
WaistAZPtech (abdomZeroPressure)
Recommended Usecross-country, downhill, enduro, mud/sand/snow, trail
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: 3

Nice shorts, no hip pads

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

I’m a big fan of the Assos road kits. After a recent spill on my mountain bike, I decided to try these liners since they (purportedly) offer hip protection. The bibs are well constructed and fit like a glove but did not arrive with the hip padding. I checked the Assos website and they’re out of stock on the pads. Fail. I purchased some D30 armor on Amazon and plan to cut the armor down to fit the Assos padding sleeve. I like the bibs but am disappointed in Assos for not including the padding clearly pictured.

>Rating: 4

Straps too short

I returned this product before using it
Runs small
Size Bought
L and XL
6` 3"
180 lbs

I usually wear a L and sometimes an XL in Assos. The non-bib L fits great. The L bib is too short and pulls heavily on my shoulders when in the biking position. Bummer. The XL is short as well and the pad seems a bit larger than my road gear. I suspect the length issue has to do with different materials. My road straps seem to stretch more easily than the trail bibs. Not sure why the seems are in the middle, but I couldn't notice them on the non-bib trail liners while riding. 74.5" 180lbs. BTW: pas came only with my non-bib trail liners.

>Rating: 2

Seam in the wrong place

I returned this product before using it
Runs small
Size Bought
5` 11"
188 lbs

Wanted to like these but they seamed them right up the middle in the front. So stupid on bib shorts meant for men. Chamois was a bit thick for my liking but the seam was the reason I returned them. Probably better off just buying a pair of their road bibs and foregoing the pockets.

>Rating: 5

Almost Perfect

I've put it through the wringer
True to size
Size Bought
6` 0"
182 lbs

Great product..the thigh grips could be reduced in circumference by 1 inch.

>Rating: 5

love em

True to size

These shorts are awesome. Top notch Assos quality in a lightweight short to wear under my baggies. The chamois is super comfortable, fit is perfect, and the pockets are a nice addition.

>Rating: 1

No hip pads

I've used it once or twice and have initial impressions
True to size

Description is a bait-and-switch. No hip pads come with. For the price that is nuts. And the hip pads are out of stock even if you wanted to buy them separately. Never buying Assos again.

Hummm...mine came with pads. They must of sent me yours just to tick you off.


Got one of these assos bibs. It dosnt come with removable protection pads. What is the part number for these pads