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Nucleon Flex Plus Knee Protectors


SKU 6521020-10-S
UPC 8059175199875
Color: Black
Availability: In stock and ready to be shipped

The Nucleon Flex Plus family of protectors feature a rider-friendly design which adapts to the contours of the rider’s body, thus ensuring maximum comfort and protection. Boasting a sleek, low profile shape, these protectors blend a lightweight, perforated open cell structure with Alpinestars Flex technology in an ergonomic design for maximum levels of movement on the bike.

• Cell structure ensures maximum comfort and ventilation.

• 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:·Knee protector according with the EN 1621-1:2012 Level 1.
• Protector cells are bridged together, allowing for an adaptive shape and enhanced levels of comfort and protection.

• Ergonomic design that allows high levels of movement.
• Slim design makes the protector discreet off the bike.


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Orders usually ship within one business day if the order is placed before 11am Pacific time.

Estimated delivery time is 1-5 days. Shipping companies do not guarantee a delivery timeframe. 

Orders over $149 qualify for FREE shipping. All other orders are shipped at a flat rate of $9.99.

For consumer protection, all orders are subject to review. On occasion, this may extend the processing time of your order. For questions regarding order, please call – (US) 1-800-409-0903 / (INT) +1-310-891-0222 / Email:


We are currently only able to ship to addresses within the United States of America. Please contact your local Alpinestars distributor for details of your closest dealer.

Refused Shipments: If you refuse shipment of your order, you will be responsible for the original shipping costs, as well as any cost associated with the refusal.