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Alpinestars B2 Carbon Knee Brace

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Alpinestars B2 Carbon Knee Brace
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Alpinestars B2 Carbon Knee Brace

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The B2 Carbon Knee Brace reduces the risk and severity of knee injury by preventing excess torsional force transfer to the knee in the even of an accident. Constructed from an ultra-lightweight carbon fiber composite, the B2's innovative design provides protection while still allowing the full range of normal knee movement while riding.

  • Lightweight, rigid carbon composite frames offering excellent protection and tibia capture
  • Anatomical form leads to a snug fit
  • Articulated Patella System offers excellent impact protection for the knee cap (patella system can be removed for activities not requiring the need for a patella system)
  • Hinge motion mimics natural motion of the knee joint
  • Variety of extension stops to limit extension
  • Semi rigid lateral cuffs with soft touch over-molding for comfort. Nonelastic straps and condyle support offer medial-lateral stability
  • Static non-slip suspension via four straps
  • Quick disconnect lateral buckles for easy fitting and removal
  • Twill carbon look with glossy finish
  • Four off-the-shelf sizes to fit wide range of leg sizes
  • Total weight (single 745g)
  • Knee sleeve included and available as spare part
  • Black

Alpinestars Knee Brace

Knee Width (in) 3-27/32 - 4-13/32 4-13/32 - 4-31/32
Knee Width (cm) 9.8 - 11.2 11.2 - 12.6

General Sizing information

If you are unsure about your size, compare your body measurements to the charts provided to determine the correct fit. These charts will give you a good idea of the size to order, but be sure to read special sizing information that may accompany an item description. Some merchandise dimensions may vary from the averages charted here.

Knee Width

Using a caliper, measure the width of the knee joint across the kneecap. The leg should be completely straight and in a weight bearing position.


Age & Gender
Model Name for Gear

Item Numbers

Details Item Number Availability Store Pickup
Details:  S Item #020-2704-0223 Availability:In stock: Ready to shipStore Pickup:Available
Details:  S Item #020-2704-0227 Availability:In stock: Ready to shipStore Pickup:Available
Details:  M Item #020-2704-0228 Availability:In stock: Ready to shipStore Pickup:Available
Details:  L Item #020-2704-0229 Availability:In stock: Ready to shipStore Pickup:Available


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