Skip to content

Nucleon KR-3 Back Protector

The Nucleon KR-3 delivers premium road protection with an anatomical fit, lightweight construction and advanced hybrid impact-absorbing technology. Designed to be worn under leather or textile gear, it features modular rib protection, a vented lattice shell and a viscoelastic core for superior flexibility, comfort and CE Level 2 safety.

• Available in three waist-to-shoulder sizes to cover all body types
• High-performance polymeric shell for flexibility and reduced weight
• Hybrid construction with lattice shell and viscoelastic PU foam
• Horizontal flex channels for adaptive comfort in all riding positions
• CE Level 2 back protector (EN1621-2:2014)
• Single-injected lattice structure maximises airflow and impact absorption
• Soft viscoelastic PU foam along the spine for comfort and energy dissipation
• Convex hard-shell design enhances spinal impact protection
• Adjustable rib protectors for added side-impact coverage
• Shoulder blade padding extensions protect critical upper-back zones
• Waist adjustment system with slim vented kidney belt for stability
• Adjustable, detachable shoulder straps with snap-fit system
• Compatible with Nucleon KR-C chest protector (sold separately)
• Compatible with Nucleon KR-TB tailbone protector (sold separately)

Shop DR MOTO for Alpinestars premium back protection and rider safety gear.