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Alpinestars Bionic MX Knee Protectors
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Alpinestars Bionic MX Knee Protectors


  • Articulated protector follows the movements of the knee joint
  • Impact resistant and ventilated thermoplast shell with aluminum reinforced knee cup for superior energy absorption
  • Ergonomically designed to fit the knees and the side of the bike with an asymmetrical form
  • Removable and impact resistant biofoam padding with a comfortable Lycra liner
  • Adjustable Velcro straps strategically placed to prevent skin abrasions
  • Durable billet aluminum hinges
  • Snap assembly for easy cleaning
  • One size
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Have a functionality, fit, or otherwise product-specific question about the Alpinestars Bionic MX Knee Protectors? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

Alpinestars Bionic MX Knee Protectors
Already Asked: 3 Questions, 8 Answers
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RevZilla Store asked: Why did you choose this?
ricardo C: por que ya tube uno de estos y son muy buenos Jan 4, 2015
Parvez S: Thought them to benefit me like knee sliders as I was a beginner and I ride canyons and do take some fast curve angles. But learned my lesson late.. Nov 19, 2014
Elliot Y: Only product fitting my need. Jun 25, 2014
Elliot Y: I planned to wear a knee protector on TOP of my pants. These looked the best and decent reviews just validated my decision. May 16, 2014
Ian C: Got for off-road riding. I wear them under my desert riding pants. I love the full pivot. Not bulky - Fits nicely into the top of my boots. One-size-fits all is tough - My knees are a bit small so the fit is not exactly snug, so there is some movement there. At the end of a long day of riding they did ok. Slight digging, but minor. Didn't fall so I cant attest fully, but they seem like they'll hold up well when I do. Feb 10, 2014
Robert T: I have had a pair of these for sometime now and found them really good. Due to a recent crash, I cracked my left guard so it is now scrap. So thought i would replace with the same and perhaps next time I break the right and still have a pair. Unless you guys can supply just one left guard ?? Jan 2, 2014
A shopper asked: do they come in pairs or i have to buy 2 ? Feb 20, 2012
Answer this · Send to friends Good question? Yes (1) No (0)
AdamV: They come in pairs, there is a left and right that are marked. Apr 21, 2012
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A shopper asked: are these ce certified? Mar 16, 2013
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RevZilla: The Alpinestars Bionic Mx Knee Protectors are not CE approved. For a higher level of protection with CE approval check out the Alpinestars Bionic SX Knee Protector. Mar 19, 2013
Reply to RevZilla Good answer? Yes (0) No (0)

Alpinestars Knee Brace Sizing

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

Click here to see the full Alpinestars Size Chart
Product Style RevZilla Item # Manufacturer Product # Availability
Alpinestars Bionic MX Knee Protectors 305291 650633-13-OS/27040001 In Stock: Ships within 24 hours