Black Alpinestars Nucleon KR-Celli 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.


The triple segmented back shell plate is constructed from a high performance polymeric material blend for optimized flexibility and excellent weight saving properties.

Unique cell micro-structure designed for advanced energy absorption, adaptivity, maximum breathability and air flow.

Back Protection – EN 1621-2:2014 Level 1

The ultra-lightweight Nucleon KR-CELLi Protector insert is developed in tree waist-to-shoulder dimensions to cover all body sizes.

The back protector’s structure design and structural change from center towards the outside provide the perfect balance between force dispersion and energy absorption.

Ergonomic protection plate contours to the natural curve of the back ensuring optimum fit while riding.

Horizontal flexion groves for an adaptive fit in different riding position.

Soft comfortable airmesh on the body side of the protector offers maximum breathability and rider comfort.

Alpinestars Nucleon KR-Celli Back InsertBlack

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The extremely lightweight, CE-certified KR-CELLi Protector 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.


Alpinestars Road Back Protector Size Guide
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Additional information

Size Armour Adults

Small, Medium, Large