Alpinestars Rk-1 Plasma Knee Braces Motorcycle Personal Care

The RK-1 PLASMA Knee Brace is anatomically profiled for demanding off-road riding, delivering superior structural support, lightweight design, and exceptional breathability. Engineered for performance and longevity, this brace focuses on comprehensive injury reduction without compromising rider comfort. NOTE: This product is sold as a pair.

Maximum Structural Integrity & Injury Prevention 

The RK-1 PLASMA is CE Level 1 certified and meticulously designed to protect key anatomical areas, making it an essential piece of high-performance knee protection for aggressive riders.

• Injury Risk Reduction: Provides optimal structural support to reduce the risk of sustaining injuries to the:

  • Medial and Lateral Collateral Ligament (MCL and LCL)

  • Anterior and Posterior Cruciate Ligament (ACL and PCL)

  • Lateral and Medial Meniscus

• CE Certified Protection: Meets the stringent European safety standards: Knee Protector: EN 1621-1:2012 LEVEL 1.

Innovative Hybrid Frame Construction

The core of the RK-1’s strength lies in its innovative use of materials, providing both rigidity where needed and adaptive flexibility.

• Hybrid Frame Technology: Features a flexible composite over-injected onto a high-performance polymer blend, offering superb frame rigidity while maintaining flexibility at the upper and lower strap areas for a dynamic fit.

• Nucleon PLASMA Protector: A highly effective, eco-friendly, and sustainable viscoelastic material engineered from USDA-certified bio-based polymers. It is lightweight, highly ventilated, and structured to dissipate impact energies in all directions.

• Optimized Hinge System: The extremely stable, slim-design four-point hinge system perfectly follows the natural articulation of the knee.

• Adjustable Extension Stops: Includes extension stops (0 to 30 degrees) to assist in setting the desired maximum opening angle, preventing hyperextension injuries.

• Durability: Features anti-oxidation treated stainless-steel bushings within the hinge system for long-term reliability.

Adaptive Comfort and Secure Fit

Designed to stay securely in place and prioritize rider comfort during long, challenging rides.

• Triple Segmented Knee Cups: Replaceable cups are constructed with a durable polyurethane outer shell backed by the Nucleon PLASMA protector, providing the optimum blend of impact protection, flexibility, and scratch resistance.

• Self-Centering Design: The self-centering knee cup, combined with strategically positioned patella extensions, ensures maximum coverage regardless of the knee's flexion or extension angle.

• Superior Comfort Padding: Soft-touch thermoformed padding ensures the highest level of rider comfort and keeps the knee brace securely in position (padding is replaceable).

• Secure Strap System: Equipped with four individual straps backed with a non-slip material, utilizing high tensile strength buckles and a central keyhole snapping system for easy, adaptive, and secure locking.