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Nucleon KR-R Cell

The Alpinestars Nucleon KR-R is a premium track and race back protector engineered for high-performance riding. Combining a hard-shell outer with energy-absorbing viscoelastic memory foam, it delivers exceptional flexibility, cooling, and CE Level 2 impact protection. Designed to contour naturally to the rider’s spine, the KR-R remains lightweight, breathable, and stable at speed thanks to its adjustable waist system and secure snap-on attachment compatibility.

Key Features

• CE Level 2 certified (NUCLEON KR-R CELL) for top-tier race impact protection
• Hybrid construction: hard-shell exterior + viscoelastic memory foam for comfort and energy absorption
• Developed in three waist-to-shoulder sizes for a precise anatomical fit
• Highly perforated structure for superior airflow and temperature management
• Ergonomic contouring follows the natural curve of the spine for all-day comfort
• Horizontal flex grooves provide adaptive movement in various riding positions
• Extended lower back protection for increased coverage at race pace
• Compatible with Nucleon KR-TB lower spine protector (sold separately)
• Height-adjustable, dual hook-and-loop kidney belt for secure personalisation
• Soft Bio-Foam chassis for enhanced comfort against the body
• Snap-on system allows attachment to Alpinestars suits and jackets

Proudly supplied by DR MOTO — New Zealand’s trusted Alpinestars protection specialist.
Premium armour inserts, expert advice, and fast nationwide shipping to keep riders confident and protected.