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Item # AAS0142

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Item # AAS0142


If there's one category in which Assos most clearly asserts its dominance in the cycling apparel market, it's with bottoms -- bib shorts and tights. After all, a short inspection of something like the T F.I.13_S5 bib shorts makes you recognize the complexity of the cut and the materials involved to make a technical piece that comfortable and that functional. And for the DB.ZERO trackPants, Assos harnesses every bit of its expertise. Meant for after the bike, or as the 'D' and the 'B' stand for -- Dopo Bici -- these bottoms provide a skillful balance of style, comfort, and functionality.

In true Assos fashion, the trackPants are made from multiple materials, with the bulk of the pants being constructed from Assos' DB.Zero fabric -- a four-way stretch that easily moves with your body while keeping the overall weight of the pants light. The waistline, the hips, crotch, and the knees are made from DB.Follow.180 fabric. This material is bi-elastic, breathable, and soft to prevent any biding to the skin as you move. Both fabrics are also highly efficient at transferring moisture.

For comfort, the trackPants use Assos' Smart Waist Design to free the abdominal area from pressure points. Not stopping there, Assos designed the pants in accordance to its Ergonomically Correct Pattern Design. This means that every stitch, every panel, is purposefully placed to complement the movements of cycling. Additionally, the right lower-leg features a zipper that can be opened for easy cuff rolling before you roll out to fetch your morning coffee.

Knowing that these are post-ride pants, Assos incorporated a series of zippered pockets and flaps for both comfort and functionality. There are two front hand pockets, the aforementioned leg zipper, and a front mini zipper.

The Assos DB.ZERO trackPants are available in six sizes from X-Small to TIR and in the color Black.

Tech Specs

Removable Chamois:
Assos Smart Waist
2 zip hand, 1 front zipper
[pants] DB.Zero, [waist, hips, crotch, knees] DB.Follow.180
Recommended Use:
post-ride relaxation
Manufacturer Warranty:

Size chart

Fuji Bicycles


Geometry Chart


Altamira LTD

Seat Tube


Effective Top Tube








Head Tube


Head Tube Angle


Seat Tube Angle


Bottom Bracket Drop


Chainstay Length



44 44.0cm 51.5cm


36.3cm 72.1cm


72.0 deg 75.0 deg 6.9cm 40.5cm 97.1cm
47 47.0cm 53.0cm


37.0cm 74.1cm 13.0cm 72.5 deg 74.5 deg 6.9cm 40.5cm 97.7cm
50 50.0cm 54.5cm 54.0cm 37.0cm 76.0cm 14.0cm 73.0 deg 73.5 deg 6.9cm 40.5cm 97.6cm
53 53.0cm 56.0cm 56.0cm 37.9cm 78.3cm 16.0cm 73.5 deg 73.5 deg 6.9cm 40.5cm 98.6cm
55 55.0cm 57.5cm 58.0cm 38.9cm 80.1cm 18.0cm 73.5 deg 73.5 deg 6.9cm 40.5cm 100.1cm
58 58.0cm 59.0cm 60.1cm 39.7cm 82.1cm 20.0cm 74.0 deg 73.5 deg 6.9cm 40.5cm


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