UPDATE: After 10 glorious years our longtime Showroom is moving! Our online store remains open 24/7 while we build out our new HQ. Thank you for the support during this transition, and be sure to sign up to our email list to stay updated on our new location.

icon-delivery Created with Sketch.

Free Shipping over $40

icon-restock Created with Sketch.

Easy Returns

icon-quality Created with Sketch.

Earn Loyalty Rewards

icon-price Created with Sketch.

Automatic Price Match

The Alpinestars Nucleon KR-2i Back Protector is designed to fit Alpinestars jackets with a correspondingly sized back insert pocket It’s made of plentifully thick PU foam perforated for airflow and carries a level 2 CE certification.

Features:

  • CE Certified Level 2 (EN1621-2:2014)
  • Lightweight, flexible PU injected impact foam
  • Contoured for anatomical and adaptive fit
  • Perforated for breath-ability and comfort
  • Channel ventilation system for optimized airflow

Men's Jacket sizing:
44-50 or XS-MD: Medium Nucleon
52-64 or LG-4XL: Large Nucleon 

Women's Stella Jackets sizing:
36-38 or XS-SM: Small Nucleon
40-50 or MD-3XL: Medium Nucleon 

Actual Dimensions:
SM - 15" L x 8.75" W
MD - 16.75" L x 9.75 W
LG - 17.75" L x 10.75" W

 

*For lighter-weight and more flexible CE Level 1 protection check out the Alpinetsars Nucleon KR-CELLi back protector insert. 

Alpinestars Nucleon KR-2i Back Protector

Regular price
$59.95
Sale price
$59.95
Quantity must be 1 or more

The Alpinestars Nucleon KR-2i delivers CE Level 2 protection and airflow to both men's and women's Alpinestars jackets.  Read More Read More

Size
  • icon-product-shipping Created with Sketch. Free shipping for this item

About The Brand

Since its inception as a motocross boot manufacturer in the Dolomite Mountains of Italy, circa 1964, Alpinestars has earned a reputation as a top supplier of performance gear to some of the best motorsports athletes in the world.

More products by Alpinestars

The Alpinestars Nucleon KR-2i Back Protector is designed to fit Alpinestars jackets with a correspondingly sized back insert pocket It’s made of plentifully thick PU foam perforated for airflow and carries a level 2 CE certification.

Features:

  • CE Certified Level 2 (EN1621-2:2014)
  • Lightweight, flexible PU injected impact foam
  • Contoured for anatomical and adaptive fit
  • Perforated for breath-ability and comfort
  • Channel ventilation system for optimized airflow

Men's Jacket sizing:
44-50 or XS-MD: Medium Nucleon
52-64 or LG-4XL: Large Nucleon 

Women's Stella Jackets sizing:
36-38 or XS-SM: Small Nucleon
40-50 or MD-3XL: Medium Nucleon 

Actual Dimensions:
SM - 15" L x 8.75" W
MD - 16.75" L x 9.75 W
LG - 17.75" L x 10.75" W

 

*For lighter-weight and more flexible CE Level 1 protection check out the Alpinetsars Nucleon KR-CELLi back protector insert. 

About The Brand

Since its inception as a motocross boot manufacturer in the Dolomite Mountains of Italy, circa 1964, Alpinestars has earned a reputation as a top supplier of performance gear to some of the best motorsports athletes in the world.

More products by Alpinestars

Related Products

  • Regular price
    $29.95
    Sale price
    $29.95
  • Regular price
    $19.95
    Sale price
    $19.95
  • Regular price
    $49.95
    Sale price
    $49.95
  • Regular price
    $60.00
    Sale price
    $60.00
Alpinestars Nucleon KR-2i Back Protector

icon-confirm-check Created with Sketch. The Item Was Added To Your Cart

Alpinestars Nucleon KR-2i Back Protector

- Treat yourself -

  • Regular price
    $29.95
    Sale price
    $29.95
  • Regular price
    $95.00
    Sale price
    $95.00
  • Regular price
    $79.99
    Sale price
    $79.99
  • Regular price
    $15.00
    Sale price
    $15.00