Log In / Register
Cart (0) Checkout
Alpinestars Bionic Freeride Shorts
  • Alpinestars Bionic Freeride Shorts
  • Alpinestars Bionic Freeride Shorts

Please select a Size to check availability, or to add this item to your Shopping Cart or Wish List.

Select Size:

Size Chart
Select qty:
Your Price
Please select a Size to view availability.

Video Review

Alpinestars Bionic Freeride Shorts Videos

Alpinestars Bionic Freeride Shorts

Created to be worn under a pair of motocross pants to provide protection for offroad riding, skiing or downhill MTB, Alpinestars Bionic Freeride Short delivers performance, safety and comfort.


  • Protective yet extremely comfortable and flexible under pants
  • Lycra and mesh base construction
  • Ventilated, Bio-foam padding on hip, thigh and tailbone area for provides comfortable yet highly effective impact protection
  • Hard PU inserts reinforce the thigh and tailbone areas for additional impact and abrasion resistance
Write a Product Review for a chance to win our monthly $100 giveaways.
Alpinestars Bionic Freeride Shorts 4.6 5 76 76
Awesome! These pants are awesome! They do exactly what you expect but two issues to keep in mind: First, you need to go at least one size up from what you would normally order. I have a size 36 waist which should have been a large size but the large was way too tight even if worn with nothing but underpants underneath. I wear mine between jeans and an outer layer and so I needed a 2XL to fit over my jeans. Even though the armor is stout stuff my extra large pants easily went over them. Second, the there is no "fly" to unbutton in the front so you'll have to take a leak like a chick if you're wearing these shorts. Aside from the sizing issue #taken care of by the very liberal exchange policy of RevZilla# this is my only real complaint about these armored shorts. March 19, 2015
Luck favors the prepared Riders- I own a 08 gsxr 6 and a 2010 r6. Although none of us plan to fall, as the saying goes "there are only 2 types if riders, those who have fallen and those who haven't fallen yet." Well I had my first low side over the weekend. Coming off a country road making a left through the intersection hit a gravel patch whoosh!!! The bike came out from under me. Palm, knee, thigh shoulder head all hit the concrete. I got up, dusted myself off, stood my bike up, inspected for damage. Damaged frame slider only- minor scratches on lower fender- easily covered by sticker or two. Rode another 140 miles. Aldo had Dainese knee guards. No physical damage other than a charley horse on my shoulder. Definitely a different story without gear. "Is rather have it and not need it, than need it and not have it". Ride on, Cam Swazey January 19, 2015
Is confortable This product has Good protection and protects very well. January 12, 2015
Not much for daily use It doesn't come with a string on the waist. It runs a little bit small. It makes your pants look bulky. It's not an everyday protection gear unless you ride MTB or motocross. December 2, 2014
One of the only hard shell options on the market If you're looking for protective hip pads in an undershort format, this is one of the only options on the market. The pricing is comparable to other soft foam options -- so it's a pretty good deal price-wise. Hard plastic is very solid. You get tons of abrasion resistance. Lots of venting. It won't breath as well as foam, but that's the trade-off for protection. It's also heavier than foam options, but again you are getting a lot more protection. I bought this for downhill biking and the extra weight isn't a big deal given the other pads and bike weight. Some complaints: -order a size up. These run small. I'm a 33-waist and the large is just a slight bit tight.Also, they are a bit bulky, so your mountain bike shorts will fit tighter. -washing. I don't think it is a good idea to machine was these. I think the disparate materials (hard plastic stitched to the liner) would lead to ripping. I hand-washed these and the red liner turned the water pink. Be careful if you don't want your other clothes turn pink. -no chamois. No a big deal if you are using this for motorcycles. But for mountain bikes, you don't get the extra taint padding. Not a huge deal for downhilling since you aren't in the saddle much anyways but worth noting. Pros: -best-in-class protection -reasonable pricing -decent ventilation I landed a jump short and went over the bars. No even a bruise to the thighs and hips. Had a low-side wipe-out. Again, hips and thighs were totally protected. November 10, 2014
Great product, my only issue is that runs small Bought this to use it with my Alpinestars racing suit. It is well built and it is confortable, doesn't really feel bulky and the protectors are not bothering me at all. I'm a 34'' waist and I ordered the Large but still is difficult for me to wear it specially when passing it through the legs, once I have it on it is a great protective short. I would recommend this to anyone who needs extra protection. November 3, 2014
The will protect I have worn these shorts many times trail riding. I had not thought I had tested them on a few of get offs until I inspected they sides of the shorts and the hard plastic had been marred by an impact. The shorts had provided excellent protection. I notice the shorts are warm when I stop to rest however I will continue to use these shorts even on the hottest days. The shorts add bulk however this is not a problem for me. November 2, 2014
Great product and surprisingly comfortable These are great shorts with great protection features. Because of the hard panels they are a little bulky like a back protector is but well worth it for the extra protection they provide. October 13, 2014
2 3 4 5 ... 10 next>>
Use our Product Q&A for a chance to win our monthly $100 giveaways.

Have a functionality, fit, or otherwise product-specific question about the Alpinestars Bionic Freeride Shorts? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

Alpinestars Bionic Freeride Shorts
Already Asked: 13 Questions, 74 Answers
Sort by:
RevZilla Store asked: Why did you choose this?
Patrick J: Because I feel naked without any protection around my waist Mar 23, 2015
Merquis G: Did not fit well returned Mar 14, 2015
P E: seemed the best option for stunt riding Feb 8, 2015
JD D: For enduro rides and more aggressive dirt road riding like Big Bend National Park. Dec 22, 2014
Peter Jay J: Survival and safety. I ride mainly on highways at high speeds. Nov 29, 2014
R M: Company reputation, good reviews. Nov 3, 2014
michael j b: reviews were good - had good luck with A-stars products. Oct 30, 2014
edward l: so I can pretend to be iron man in my living room Oct 19, 2014
Arnold G: to protect me ars if I come off my bike! Oct 8, 2014
Nathan K: I needed something to turn everyday wear into aggressive wear. Aug 17, 2014
Christopher L: One of the only hard shell impact shorts on the market. Aug 13, 2014
Claudio G: Fantastic Aug 3, 2014
Roger R: I want to have the most protection from every ride I go out. Jul 3, 2014
Bruce B: good price. works well. Jun 6, 2014
Yunfei J: great May 23, 2014
J C: After a recent racing accident I almost broke my hip this will help reduce the impact damage immensely Apr 30, 2014
orlando F: my riding buddy told me to protect my jewels and choose these to cover everything so I went with it. Apr 24, 2014
Eric C: Extra protection and versatility for use with different riding gear. Apr 17, 2014
Austin E: something i can wear daily under my jeans...hopefully Apr 16, 2014
michael c: For when price and style have little protection Apr 15, 2014
Felix L: recommended by your team. Mar 31, 2014
Shaun B: Chose these to wear under leather/mesh Icon Compound pants; will review once I receive them Mar 29, 2014
Brooks M: Wanted something that I could wear under my jeans or chinos for casual rides. Jan 30, 2014
Brady M: To wear under shorts in SoCal summer riding. Combined with Gaerne Boots and MSR Reflex Knee Braces. Jan 19, 2014
Jeremy W: After I low-sided last season, I realize that my injuries would've been prevented had I worn more protection. So, I decided to get the Alpinestars Bionic shorts after comparing several other shorts. They have the protection and they look really comfortable! Jan 10, 2014
Robert L: Protection Dec 11, 2013
Chris B: Needed it to complete the set Nov 28, 2013
Johnnie B: My "go to" armored underwear. I almost always use these armored shorts for my long highway trips. Comfortable, easy to wear, substantial upper-leg protection. Nov 4, 2013
camilo p: Amazing you can use it even for a daily ride!!!! Oct 22, 2013
Douglas B: Wanted added protection and the review suggested that it fit well and didn't bother rider comfort. Oct 17, 2013
Marvin S: Protection while dirt bike riding Sep 4, 2013
J A: To wear under my jeans. Aug 31, 2013
Jee L: I'd like to be as safe as I can while riding. Aug 16, 2013
A shopper asked: if my waist measurement is 32 what is the best size for me? Apr 23, 2011
Answer this · Send to friends Good question? Yes (0) No (0)
davekmdmd: I'm 5'8", weigh 158. 32 pants are a bit large for me. I wear 31 waist when I can get pants in that size. I purchased MEDIUM and they fit fine. The waist/seat was maybe a tad large and the leg opening maybe a tad small, but I wore them for 2 full days at Cornerspin 'roadracing in the dirt' school and they were nearly perfect for me. May 12, 2012
Reply to davekmdmd Good answer? Yes (0) No (0)
Kman: I'm a 32 and have prechased a med. It is a nice snug fit alittle tight in elastic around leg if u r planing on getting any hevyer I would buy next size up May 7, 2011
Reply to Kman Good answer? Yes (0) No (0)
Aerikk: your waist is not a "squishy" area. Stick with your actual pant size unless you are planning to wear more than two layers. May 24, 2012
Reply to Aerikk Good answer? Yes (0) No (0)
Lestat: I based my purchase on their sizing chart and with me, they got it right. I would recommend you get size Medium. Jan 12, 2012
Reply to Lestat Good answer? Yes (0) No (0)
CandyR6: Unless you are REALLY lean with very little muscle mass and not butt, then you need a large like I did. Mar 21, 2013
Reply to CandyR6 Good answer? Yes (0) No (0)
rusk: i got s/m and im a 30 and it fits good and comfortable it has a lot of adjustability :] Apr 26, 2011
Reply to rusk Good answer? Yes (0) No (0)
fatboypin: I have the same waist. My height is 1.77m, 70kg.
MD fits like a glove - snug.
Apr 15, 2012
Reply to fatboypin Good answer? Yes (0) No (0)
Chris K: I think a MD would give you a snug fit. Apr 25, 2011
Reply to Chris Good answer? Yes (0) No (0)
A shopper asked: How well would this fit under a 1-piece racing suit? My suit came with some cheap foam hip protectors that have since torn off and I'm looking for something with a bit of hip/thigh/tailbone protection but don't want it to be too bulky or stick out of the suit too much. Dec 27, 2013
Answer this · Send to friends Good question? Yes (0) No (0)
Darrin K: I could not directly say. I ride off road so my pants fit a little loose but these shorts are pretty slim fitting. The hard panels are a little bulky but I do not see how you can get around that without going to just soft padded armor. If you want some hard stuff between you and the ground, I would imagine you have to accept a little bit of bulk. That being said, I doubt they would make it stick out a whole lot. Dec 28, 2013
Reply to Darrin Good answer? Yes (0) No (0)
JP N: I do like these shorts, I like the protection they offer and they don't feel bulky wearing them. But they obviously add to your hip/thigh area girth. I wear them under dirt bike pants which are lose fitting, which provide plenty of room for me. I would say unless your race suit is fairly lose fitting in those areas that these probably wouldn't work. Dec 30, 2013
Reply to JP Good answer? Yes (0) No (0)
Frank S: They may be too bulky. I purchased them to use under my motocross pants and they work fine in that regard for off road riding. I think that using the FOX armored shorts may be better as they are slimmer and I use those under my 2 piece leathers for added protection Jan 1, 2014
Reply to Frank Good answer? Yes (0) No (0)
Jean C: Depends on the fit of your racing suit, i wear size large alpinestars shorts, and my normal jean size waist 34, can hardly tell these are underneath, and they offer nice level of protection compared to nothing else. Dec 27, 2013
Reply to Jean Good answer? Yes (0) No (0)
PATRICK J: They fit very well under racing suits....as long as the suit as some room to work with, it should fit comfortably. Then once you zip up and hop on the bike, you won't even notice they are there. Hope this helps! Dec 27, 2013
Reply to PATRICK Good answer? Yes (0) No (0)
Joseph N: The hip pads are a little bulky but offer great protection. They should fit just fine. I wear them under jeans. Dec 27, 2013
Reply to Joseph Good answer? Yes (0) No (0)
Denis I asked: Hi, if i will wearing it with pants 'alpine stars A10 sport' it be comfortable or not? Jun 1, 2014
Answer this · Send to friends Good question? Yes (0) No (0)
JD D: I'm never aware that I'm wearing them while riding. They're that comfortable. I sit just a little forward of upright and ride an R1200GSA and a Yamaha WR250R. Jun 1, 2014
Reply to JD Good answer? Yes (0) No (0)
Denis I: what pants are you wearing? Jun 1, 2014
Gui F: They're comfy, have worn them to track days and never got in the way, Jun 14, 2014
Reply to Gui Good answer? Yes (0) No (0)
Bruce B: I agree with the answer above. You forget you are wearing them. Jul 3, 2014
Reply to Bruce Good answer? Yes (0) No (0)
Enerius I: it's comfortable. Jun 3, 2014
Reply to Enerius Good answer? Yes (0) No (0)
A shopper asked: Would these be suitable and good for street riding? Daily commuting, and joy riding? I can't always suit up in leathers. But would like to have some peace of mind knowing that if I slid across the pavement my hip and thoughts will still be useful. What other suggestions do you have? I like to be able to wear jeans when I'm in a rush and get called into to work for an emergency Mar 6, 2014
Answer this · Send to friends Good question? Yes (0) No (0)
Stefan L: Yes, they work well for that. They do not get too hot in the summer and provide better protection than most hip pads and riding pants. I purchased them and am using them because of the fact that I wanted more protection. As others have described they are well padded and you might have to get a pair of pants that will comfortably fit over them. Jeans with Kevlar panels will not help you in the initial impact, that's where these will come in and they could protect you from fracturing any bones in a crash. They run at least a size small though. Apr 6, 2014
Reply to Stefan Good answer? Yes (0) No (0)
JD D: As long as your jeans fit a little loose in the hips and thighs you should feel comfortable wearing the Freeride shorts underneath. Whether or not the tailbone armor plate causes discomfort is a matter of personal fit. I'm comfortable walking and sitting all day in mine. You might also consider jeans with Kevlar panels. Mar 6, 2014
Reply to JD Good answer? Yes (0) No (0)
Bobby A: I bought these for street riding and ended up using them for dirt only. The sides are really thick. So unless you have a lot of room in your jeans it will not feel good or fit. Mar 7, 2014
Reply to Bobby Good answer? Yes (0) No (0)
Thomas W: I wear these most of the days I am riding. Very comfortable more stealthy than they appear in the photo's. ATGATT.... Mar 14, 2014
Reply to Thomas Good answer? Yes (0) No (0)
A shopper asked: Does these fit along the lines of compression shorts and boxer briefs? Jan 28, 2013
Answer this · Send to friends Good question? Yes (0) No (0)
MJBGSXR1000: More like boxers if you go up in size, but if you try true to fit, then like compression shorts.
I have a 38" waist and went for the XXL and they fit me perfect, even though they are slightly snug, but after one ride they have stretched a bit and I do not even feel them while I ride.
Mar 17, 2013
Reply to MJBGSXR1000 Good answer? Yes (0) No (0)
RevZilla: The fit of the Alpinestars Bionic Freeride Shorts is indeed similar to the Alpinestars Comp Pro Shorts. Typically, we recommend using your underwear size as a reference. Jan 31, 2013
Reply to RevZilla Good answer? Yes (0) No (0)
Arcee: I couldn't pull these pants up over compression shorts or shorts with hip/thigh/tailbone padding. Feb 2, 2013
Reply to Arcee Good answer? Yes (0) No (0)
CandyR6: Smaller. GO A SIZE UP from your normal compression shorts/briefs. Mar 21, 2013
Reply to CandyR6 Good answer? Yes (0) No (0)
Gregory W asked: How good is the tailbone protection? I'm tired of tiny little tailbone pads that don't offer much protection. I fall on my backside a lot and I need better than average tailbone protection. Feb 9, 2015
Answer this · Send to friends Good question? Yes (0) No (0)
Tyler G: It's pretty decent. It may not feel like much, but it has saved my behind multiple times (including landing in some rocks). If you're going to be coming down from more than 3 feet or so, I'd recommend looking for a little more protection. The price/performance is great, just make sure you get the sizing right. Mar 4, 2015
Reply to Tyler Good answer? Yes (0) No (0)
Brian J: I have not taken a fall wearing them and cannot recall ever hitting my tailbone from falling off of a motor vehicle, but the tailbone protection is hard plastic with padding inder it. It looks like it will have an effect. How much of an effect is TBD. Feb 9, 2015
Reply to Brian Good answer? Yes (0) No (0)
Kevin B: Like the shorts, however, I cut my tailbone pad out! I was heading out on the road for a few months and sitting on that pad was quite uncomfortable. I really did not need it, was on my Vstrom, not my KTM. Otherwise, shorts seem solid.
Feb 9, 2015
Reply to Kevin Good answer? Yes (0) No (0)
Thamer I asked: Would you recommend using these shorts with, alpinestar Atem race suit? Is there added value? Sep 20, 2014
Answer this · Send to friends Good question? Yes (0) No (0)
Gui F: Recently crashed at a track day wearing these, about the only part of my body not bruised was my hip, so yeah, they work, and work well. you just need to check the fit of your leathers, mine are bit wide at the hip so had no problem wearing these, if you've tailored your leathers or have to really squeeze into them I can see it as being a problem. Nov 10, 2014
Reply to Gui Good answer? Yes (0) No (0)
Alton B: I'm not familiar with that race suit, but I bought these shorts to wear under my Dianese Delta pro pants and like them for their comfort and the added protection they add. Sep 20, 2014
Reply to Alton Good answer? Yes (0) No (0)
Shaun B: I wear these under Icon leather pants for the impact protection - I find them a bit bulky but quite comfortable and I like the feeling of having the added protection. Nov 16, 2014
Reply to Shaun Good answer? Yes (0) No (0)
A shopper asked: How to wash and dry ? Jan 9, 2013
Answer this · Send to friends Good question? Yes (0) No (0)
CandyR6: They have wash instructions, but I am spraying them with a fabric freshener between washes, then hand washing and line drying them when they do need need a real wash. If you do machine wash them I would suggest putting them in a load with other large soft times like towels and pants. I would personally avoid machine wash as much as possible though, for both their sake and your machine's sake. Mar 21, 2013
Reply to CandyR6 Good answer? Yes (0) No (0)
kevin c: For most synthetic sports clothing, warm to cool water, whatever soap you normally use BUT I rinse twice to ensure I remove all of the soap residue. I prefer to air dry indoors whenever possible. The dryer is hard on gear. Mar 15, 2013
Reply to kevin Good answer? Yes (0) No (0)
RevZilla: Good question! We contacted Alpinestars and they recommended hand washing with a cleaner that does not use detergent, then air dry. Machine washing and drying may damage the product. Jan 9, 2013
Reply to RevZilla Good answer? Yes (0) No (0)
James D asked: How does this armor compare to CE 1&2 level armors? Sep 29, 2014
Answer this · Send to friends Good question? Yes (0) No (0)
glen i: It's obviously very rugged, if not a bit overboarddue the enourmity and thickness of the pads. You really have to size the pants up to handle that thickness especially if you have large upper legs. On my superbike, I simply can't use them because my suit isn't sized accordingly. so I use my FOrcefields with a couple layers of padding removed. For offroad, I use my forcefields with all layers. I suppose the Alpinestars offer greater protection than my soft armour for punctures and point loads due to the hard plastic shell, but I tend to gravitate towards the more comfortable gear and hope for the best. For a racer, I'd choose Alipinestars for greater protection and size my suit/pants accordingly. Sep 29, 2014
Reply to glen Good answer? Yes (0) No (0)
Mike L: This armor is very protective but very uncomfortable and too hot in southern California Sep 30, 2014
Reply to Mike Good answer? Yes (0) No (0)
A shopper asked: The ítem have a drag protection?? Sep 26, 2013
Answer this · Send to friends Good question? Yes (0) No (0)
Jeff H: Not explicitly but the padding is very durable molded plastic that I would think would hold up well in a slide. Sep 26, 2013
Reply to Jeff Good answer? Yes (1) No (0)
Monroe S: My guess is, No. It's supposed to provide protection from impact not dragging. The nylon that encases the armor would probably tear away if your riding pants/jeans tore open in a slide. I wear Kevlar jeans for dragging protection. Oct 2, 2013
Reply to Monroe Good answer? Yes (0) No (0)
A shopper asked: How good is the tailbone protection? I'm tired of tiny little tailbone pads that don't offer much protection. I fall on my backside a lot and I need better than average tailbone protection. Feb 9, 2015
Answer this · Send to friends Good question? Yes (0) No (0)
Cory T: The tailbone protection is very adequate. It's about 3.0" wide at the top narrowing to about 2.0" at the bottom, and somewhere between 5.0"-6.0" long. Its outer shell is hard plastic with a fairly thick softer interior layer. I never had the pleasure of crashing my motorcycle with these but I wore them under my leathers and the size of the tailbone protector didn't bother me while riding for a whole afternoon. I wear these every time I ski and they have saved me so much pain, though my tailbone is usually the last thing to hit if it does. I highly recommend the shorts for any activity that you are doing where you are pushing the limits and/or could potentially wreck/crash/fall and injure yourself. Feb 11, 2015
Reply to Cory Good answer? Yes (0) No (0)
A shopper asked: Is there padding in the seat for ride comfort ? May 20, 2013
Answer this · Send to friends Good question? Yes (0) No (0)
torquemaster: No. Side padding and small tailbone padding only. Jun 1, 2013
Reply to torquemaster Good answer? Yes (0) No (0)
Product Style RevZilla Item # Manufacturer Product # Availability
SM 605985 650707-13-S/29400174 In Stock: Ships within 24 hours
MD 605986 650707-13-M/29400175 In Stock: Ships within 24 hours
LG 605987 650707-13-L/29400176 In Stock: Ships within 24 hours
XL 605988 650707-13-XL/29400177 In Stock: Ships within 24 hours
2XL 605989 650707-13-2X/29400178 In Stock: Ships within 24 hours