Alpinestars RK-1 Plasma Knee Brace – Lightweight Hinged Knee Support for Off-Road Riding

The Alpinestars RK-1 Plasma Knee Brace is an anatomically profiled knee support engineered for off-road and powersports riders seeking structural stability, impact protection, and controlled articulation. Designed with a hybrid frame construction and integrated Nucleon Plasma protection, this brace delivers a balance of lightweight comfort and advanced ligament support.

Built for demanding riding conditions, it helps reduce stress on the ACL, PCL, MCL, LCL, and meniscus while maintaining flexibility and ventilation.

Core Purpose

• Provide structural knee stabilization during off-road riding
• Support ligament protection under impact conditions
• Improve rider confidence with controlled joint articulation
• Deliver lightweight, breathable long-ride comfort

Key Features

Hybrid Frame Construction

Engineered with a flexible composite over-injected on a high-performance polymer blend. This design enhances rigidity while allowing adaptive comfort around the upper and lower strap zones.

Nucleon Plasma Knee Protection

Features a viscoelastic protector constructed from bio-based polymers. Designed to dissipate and absorb impact energy while remaining pliable in all directions.

Triple Segmented Knee Cup System

Replaceable polyurethane outer shell backed by impact-absorbing protection. Designed for flexibility, durability, and resistance to abrasion.

Four-Point Hinge System

Slim-profile hinge follows the natural articulation of the knee. Adjustable extension stops (0°–30° range) allow riders to control maximum extension angle.

Self-Centering Coverage Design

Strategically positioned patella extensions ensure consistent protection coverage across varying flexion and extension movements.

Product Specifications

• Brand: Alpinestars
• Model: RK-1 Plasma
• Category: Hinged Knee Brace
• Intended Use: Off-Road / Motocross / Powersports
• Protection Material: Nucleon Plasma (Viscoelastic Polymer)
• Hinge System: Four-Point Articulation
• Extension Stops: 0°–30° Adjustable
• Age Range: Adult
• Size Options: S/M, L/XL

Customer Feedback Overview

Rating: 4.5 out of 5 stars
Based on 16 global ratings

Reported Highlights:

• Secure and stable fit
• Lightweight feel during rides
• Effective support for aggressive riding
• Comfortable for extended use

Reported Considerations:

• Sizing accuracy is important
• Some return experiences noted additional fees
• Occasional strap durability feedback

Ideal For

• Motocross riders
• Off-road motorcycle enthusiasts
• Trail and enduro riders
• Riders seeking ligament stabilization support
• High-impact powersports environments

Summary

The Alpinestars RK-1 Plasma Knee Brace combines advanced impact protection with a lightweight hinged support system engineered for serious off-road performance. Its hybrid frame construction, adjustable extension control, and viscoelastic protective technology make it a performance-focused option for riders prioritizing knee stability and protection.

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