Skip to content

Alpinestars SX-1 PLASMA Knee Protector

The SX-1 PLASMA Knee Protector combines Alpinestars’ advanced Nucleon PLASMA impact technology with a highly ventilated, semi-rigid frame to deliver outstanding protection, comfort and natural knee articulation. Its Dual Gear System (DGS) hinge ensures smooth, controlled movement, while the ergonomic frame design adapts to a wide range of leg shapes for a secure fit during off-road riding.

Key Features
• Nucleon PLASMA protector made from USDA-certified biobased viscoelastic material for multi-directional flexibility and reliable impact absorption
• Dual-density co-injected frame with soft scooped upper and lower extensions to prevent pressure points from boots or hard edges
• Dual Gear System (DGS) hinge allows natural knee articulation and smooth movement
• Ergonomically sculpted frames with strategically placed rigid and flexible zones for an adaptive, secure fit on various leg sizes
• Patella System ensures full coverage of the knee cup in all riding positions, with a rigid outer shell for protection against handlebar impacts
• Lightweight polymer frame construction provides strength, flexibility and excellent ventilation
• Dual-pivot hinge maintains correct positioning of the protector while riding
• Slim, ergonomic frame profile for reduced bulk and improved comfort
• Dual-strap closure system with hook-and-loop and snap-fit buckles for quick entry and personalised fit

CE Certification
• Knee Protector: EN 1621-1:2012 Level 1

Proudly supplied by DR MOTO — your trusted Alpinestars dealer, helping riders stay protected with gear we truly stand behind.