Black/White Alpinestars Nucleon KR-1i Back Insert

The NUCLEON KR-1i Hybrid Back Protector Insert is CE certified Level 2 to the latest back protector standard revision which incorporates energy absorbing foam and a perforated hard shell core for excellent safety and comfort.


  • NUCLEON KR-1i Hybrid Back Protector Insert is CE certified to Level 2 (EN1621-2:2014)
  • Lightweight construction with perforated hard shell and energy absorbing foam.
  • Hybrid back protector insert offers excellent impact resistance, while being flexible and anatomically contoured.
  • Innovative cooling airflow channel system offers optimized levels of protection and comfort for sport and street riding


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

Alpinestars Nucleon KR-1i Back InsertBlack/White


The Alpinestars Nucleon KR-1i Back Insert provides excellent impact resistance, safety and comfort for street or performance riding. It is so lightweight you won’t know it’s there, but it will definitely give you the protection you need.

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Additional information

Size Armour Adults

Small, Medium, Large