Black Alpinestars Nucleon KR-2i Back Insert

The NUCLEON KR-2i soft back protector is quick and convenient to insert and fit unobtrusively within a rider’s jacket or suit for the ultimate in comfort and safety protection.


  • Construction is lightweight, flexible PU injected impact foam
  • Contoured for anatomical and adaptive fit
  • Perforated for breathability and comfort
  • Channel ventilation system for optimized airflow
  • NUCLEON KR-2i Back Protector Insert is CE certified Level 2 (EN1621-2:2014) protection


  • Small = 15.5 x 9.5 inches, Medium = 16.5 x 10 inches, Large 17.5 x 10.5 inches

Alpinestars Nucleon KR-2i Back InsertBlack


The Alpinestars Nucleon KR-2i Back Insert is a soft insert that is extremely lightweight and flexible with an ergonomic fit. It is really quick and easy to fit, offers great breathability and provides the ultimate in safety.

Coming soon...

This product is currently out of stock and unavailable.

Alpinestars Road Back Protector Size Guide
  Fast Nationwide Shipping
  28 Day Returns & Exchanges
  Meets Aus. Safety Standards
  Simple, Secure Checkout
Browse Riding GearArmourBack Protectors

Additional information

Size Armour Adults

Small, Medium, Large