The Alpinestars RK-Plasma Knee Brace integrates advanced protective technologies to deliver robust impact resistance and rider comfort. The core structure features a USDA-certified bio-based, eco-friendly impact-absorbing material, complemented by Nucleon Plasma embedded within the shin padding for enhanced defense. To ensure a secure and personalized fit, the brace utilizes soft-touch thermoformed padding, including condyle pads available in varying thicknesses that are replaceable as spare parts. The design is certified to EN 1621-1:2012 Level 1 standards for the knee protector, offering a reliable balance of safety and sustainability for motorsports applications.
Functionality and adjustability are prioritized through a high-tensile strength buckling system that remains flexible for easy strapping, with upper and lower buckles secured via a keyhole snapping mechanism. Padded X-straps, backed with nonslip material, keep the brace firmly in position while their profiled design prevents pinching at the back of the knee during full flexion. Riders can further customize their range of motion using easily exchangeable extension stops, which are available in increments of 0, 5, 10, 15, 20, 25, and 30 degrees. The RK-Plasma is offered in four sizes—Small, Medium, Large, and Extra Large—to accommodate a wide range of leg dimensions for a precise and secure fit.