Alpinestars AS-DSL Shiro Tech Denim Riding Jeans :: MotorcycleGear.com

Alpinestars Diesel Shiro Tech Denim Jeans (Size 34 Only)

  • Inner liner on knee compartment for enhanced rider comfort.• Bio-Flex knee and hip armor for high levels of impact protection (hip armor inserts are optional).
  • Two pockets on front and back for secure and convenient storage.
  • Additional small pocket and hidden back pocket for real world practicality.
  • Ergonomic cut for enhanced rider comfort.
  • According to European statutory law the CE mark is a conformity requirement for the marketing of this product. The following standards apply to this product:
  • CE Category II PPE Regulation (EU) 2016/425 –A class.
  • CE Level 1 EN1621-1:2012 Alpinestars Bio-Flex Plus knee and hip protectors.

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Sizing Information

We measured a sampling of these jeans of different waist sizes and find they are much like other jeans you’d buy these days. They are just a bit “vanity” sized in the waist. Across the size run, the actual measured waist was about 1” to 2” larger than the stated waist size (typical vanity sizing). So my primary advice would be to buy the waist size you normally wear in jeans; you’ll likely find a fit.

If you aren’t sure whether your jeans are vanity sized like I’m describing, then either measure your waist where your normal jeans ride or measure your favorite pair of jeans to verify. You’ll probably find that you measure out a bit bigger than your normal jeans size and also the waist of your favorite jeans measures out an inch or two bigger than their stated size. If so, you will be on track following my advice. The denim used in these pants has a moderate amount stretch to them, so if you are sometimes between sizes, I’d advise you to buy the smaller.

The inseam length is right about 33” inseam in the mid-size ranges. The smaller jeans measure just a touch shorter at around 32” and the biggest waist sizes are about 34”. The fit of the jean in the seat, thigh, and knee, I’d call “standard” or “straight cut”. The ends of the jeans taper just a bit. If you are concerned about how big the leg end opening is, you can measure jeans you have and compare. The size 34 we used in our photos measures about 7” across when laid flat.

Need help measuring? Get it here.

Our Two Cents

The Diesel Shiro Tech Denim Jeans by Alpinestars is a new product for 2020. These are heavy weight denim riding jeans made with Kevlar infused denim for abrasion resistance. They include CE1 BioFlex armor in the knees and pockets for optional matching hip armor.

I really like this new jean style from Alpinestars. They are not as slim fitted as many of their designs. I find them to be comparable to straight cut Levis, but they are still slim enough to be attractive and not baggy. The fly closure is a button up, I’ll just lay that out for all of you who can’t go there, but for what its worth, the buttons work easily, so they aren’t a PITA.

Alpinestars includes a pair of Bio-Flex armor for the knees. Hip armor can be purchased separately and installed in the cloth pockets provided. Bio-Flex armor is relatively thin and extremely flexible and is perfect for riding jeans in my opinion. Many of our top brands have a similar type of armor and all are gravitating toward using it. It is thin and flexible enough to use in a jean without it throwing off the fit or being visible through the fabric. If you want to add hip armor, take the link below.

These jeans are made with Kevlar infused cotton denim with just a bit of Elastane for some comfy stretch. The jeans are relatively heavy weight, so you’ll like them for mild and cold weather maybe with some of your own thermal underwear. Being 50% cotton means they’ll breathe too.

As I mentioned in the sizing advice, these jeans are standard cut and are not a skinny fit. The factory pictures give the impression of a slim leg but they aren’t quite that way. I like the fit very much and I can see sitting in them comfortably for long periods. :: Paul, 05-29-20

Alpinestars says: Dark rinse Cordura denim with knitted fabric construction for enhanced protection against abrasion and cuts.

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