NOTE: Our “Free Shipping” service via USPS has been experiencing serious delays. If you’d like to ensure speedy service, please select UPS at checkout. Or come by the store: we are open 7 days/week with precautions. Mon-Fri 12-7; Sat 11-6; Sun 12-6

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

Alpinestars Nucleon KR-2i Back Protector
hover

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
Sold out
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

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
    $30.00
    Sale price
    $30.00
  • Regular price
    From $34.00
    Sale price
    From $34.00
  • Regular price
    $30.00
    Sale price
    $30.00
  • Regular price
    $79.99
    Sale price
    $79.99