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We're sorry but all Color/Size combinations for this product are currently out of stock. You can be notified upon their arrival by choosing the Color and Size options you are interested in and then entering your email in the yellow box below.
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Alpinestars Bionic SX Knee Protector
  • Alpinestars Bionic SX Knee Protector
  • Alpinestars Bionic SX Knee Protector

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Alpinestars Bionic SX Knee Protector

The Bionic SX Knee Protector is an advanced, streamlined guard that offers exceptional coverage to the knee, shin and lower thigh. The asymmetrical, anatomic design grants high levels of mobility while riding, while the use of lightweight, highly breathable construction materials ensure the knee guard remains comfortable, throughout a full day of riding.


  • Super lightweight knee guard that provides exceptional impact protection
  • Extensive protection zones fulfills CE standard EN 1621-1 (K+L Type B)
  • Constructed with highly breathable materials in an efficient ventilation configuration for superior airflow
  • Complete TPU protector coverage over the knee, shin & lower thigh
  • Inner medial kneecup features a sleek design for reduced material thickness between the knee and bike for greater control while riding
  • Guard is backed with highly perforated, PU memory foam to keep you cool & comfortable
  • Slim, easy to adjust straps ensure a precise fit
  • Sold as a pair
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Alpinestars Bionic SX Knee Protector
Already Asked: 2 Questions, 2 Answers
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RevZilla Store asked: Why did you choose this?
Abdulla A: CE rating, thigh strap and great looks. Jun 26, 2014
A shopper asked: riding. Will it be worth waiting for these or should I consider a product that's already out. Also what is the expected release date? Thank you. Apr 17, 2012
Answer this · Send to friends Good question? Yes (1) No (0)
FinnFan: Wasn't great, but nothing with a solid plastic cover will be. For airflow, you might try a TPro Forcefield product. Jul 19, 2012
Reply to FinnFan 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
Silver/Red/Black / XS-SM 818914 6506312-198-XSS/27040279 Out of Stock
Silver/Red/Black / MD-LG 818915 6506312-198-M/L/27040280 Out of Stock