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  • SKU: PC086158

Alpinestars KR-1i Cell Back Protector Insert

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Starting at $99.95
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Product Details

Alpinestars Nucleon KR-1 CELLi Back Protector Insert

The extremely lightweight Nucleon KR-1 CELLi insert features an articulated back shell plate for flexibility and riding fit, plus an advanced micro-structure cell design for efficient impact energy absorption and high levels of airflow.


  • Triple segmented back shell plate constructed of a polymeric material blend
  • Unique cell micro-structure designed for advanced energy absorption, adaptivity, maximum breathability and air flow
  • Ergonomic protection plate contours to the natural curve of the back
  • Horizontal flexion groves for an adaptive fit in different riding position
  • Airmesh on the body side of the protector offers maximum breathability


  • The super lightweight back protector insert is developed in three waist-to-shoulder dimensions in order to cover all body sizes
  • High performance polymeric material blend Cell Structure for optimized flexibility and excellent weight saving properties


  • Small: 15.5" x 9.5"
  • Medium: 16.5" x 10"
  • Large: 17.5" x 10.5"