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Alpinestars MTB Inner Shorts - Men's


Item # APN011J

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Item # APN011J

The feel without the look.

While spandex cycling shorts aren’t really all that popular in the mountain bike scene, it’s tough to argue against the benefits of a stretch short with a padded insert. Since aerodynamics really don’t make much of a difference to the gravity crowd, a padded liner is the answer. You still get all the benefits of a stretchy short and padded insert, but you strutting your stuff for all the world to see isn’t a requirement. The folks at Alpinestars have been designing gear for dirt junkies for about 50 years now, and they know more than just about anyone what will help a mountain biker get to the bottom first.

The Alpinestars MTB Inner Short is specifically designed to be worn underneath your baggies. Alpinestars included snap fasteners to lock the Inner Short into their Alpinestars baggies, but it can be worn under any brand of short. You can also wear the Inner Short under jeans, walk shorts, board shorts, or a tutu (not recommended).

The Inner Short’s main body fabric is a synthetic that breathes well and draws moisture away from your skin. The short is anatomically designed for a close-to-skin fit. Alpinestars incorporated its EVO insert to help manage moisture and provide cushion.

Tech Specs

100% polyester
Recommended Use:
mountain biking
Manufacturer Warranty:
21 days

Size chart


Men's Apparel
Chest 35 - 36in
(88.9 - 91.4cm)
37 - 39in
(94.0 - 99.1cm)
40 - 41in
(101.6 - 104.1cm)
42 - 44in
(106.7 - 111.8cm)
45 - 47in
(114.3 - 119.4cm)
Waist 30 - 31in
(76.2 - 78.7cm)
32 - 33in
(81.3 - 83.8cm)
34 - 35in
(86.4 - 88.9cm)
36 - 38in
(91.4 - 96.5cm)
39 - 41in
(99.1 - 104.1cm)
Hip 40 - 41in
(101.6 - 104.1cm)
42 - 43in
(106.7 - 109.2cm)
44 - 45in
(111.8 - 114.3cm)
46 - 48in
(116.8 - 121.9cm)
49 - 51in
(124.5 - 129.5cm)
Thigh19 - 20in
(48.3 - 50.8cm)
21 - 22in
(53.3 - 55.9cm)
23 - 24in
(58.4 - 61.0cm)
24 - 25in
(61.0 - 63.5cm)
26 - 27in
(66.0 - 68.6cm)
How to Measure:
For best results, take measurements over your underwear.
Measure under your arms, around the fullest part of your chest.
Measure around your natural waistline, keeping the tape a bit loose.
Measure around the fullest part of your body at the top of your legs.
Using pants that fit well, measure the crotch seam to the bottom of the leg.

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decent quality, uncomfortable chamois

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

I was excited for these as i thought A stars would be a quality product, the problem is with the chamois. It's not very soft and doesn't flex and conform to your body. Instead it will bunch up and cause uncomfortable areas. I was hoping they'd soften up after using and washing but that hasn't been the case.