Skip to Main Content
Free 2-Day

Qualifying orders $39.99 or more shipped with FREE 2-DAY delivery within the contiguous U.S. See our Free Shipping Policy for more information.

Free Shipping Policy
Free Shipping
over $39.99

Orders $39.99 or more ship free within the contiguous U.S.

Free Shipping Policy

Doesn't fit? Don't love it?

Return any unused item within 30 days for a full refund.

No-Hassle Returns

  1. Obtain an RA number
  2. Package your product
  3. Send it back to us!
Return Policy
Lowest Price,

Found it for less?

RevZilla will match any advertised price on new merchandise available through another authorized U.S. dealer.

Submit a Price Match

Elite Service Rating

Our goal is to provide the best possible shopping experience to every enthusiast who visits RevZilla.

See what our customers are saying about us:

Customer Reviews

ZillaCash Rewards Program

Earn $5 for every qualified $100 you spend. You'll also hear about special offers and events! How it works:


Sign in or create an account to earn ZillaCash on your next purchase with us.


Earn $5 for every $100 you spend on eligible items and brands.


Redeem your ZillaCash Rewards on a future order with us!

See our customer service page for more details.


Alpinestars Nucleon KR-R Race Back Protector

Item: P295326
18 Read 18 Reviews 16 Q&As Write a Review

Take it to the track with the Nucleon KR-R back protector. The slim kidney belt adds security and the waist is adjustable. Read More

Save $22.49 15%
Rebate Available! View Details

Please select a Size to view availability.

Product Details

Alpinestars Nucleon KR-R Hybrid Back Protector

The Nucleon KR-R hybrid back protector is an innovative track and race back protector that is CE certified Level 2 to the latest back protector standard revision (EN1621-2:2014). With performance cooling, flexibility and anatomical contouring, this hybrid of hard shell and energy absorbing viscoelastic memory foam is lightweight and breathable for optimized protection and comfort.


  • Waist adjustment for customized fit
  • Snap-on system to fix protector to a suit or jacket
  • Slim vented kidney belt for added security

Sizing Info:

Waist to Shoulder Length (in)  KR-R Protector Size
16 XS
17.25 SM
18.5 MD
20 LG
21 XL

Product Style RevZilla Item # MFR. Product # Availability
Product Style SM RevZilla Item #1012251 MFR. Product #6505015-125-S AvailabilityOut of Stock
Product Style MD RevZilla Item #1012252 MFR. Product #6505015-125-M AvailabilityAvailable: Requires 1-3 business days of lead time prior to shipment
Product Style LG RevZilla Item #1012253 MFR. Product #6505015-125-L AvailabilityAvailable: Requires 1-3 business days of lead time prior to shipment
Product Style XL RevZilla Item #1012254 MFR. Product #6505015-125-XL AvailabilityIn Stock: Ships within 24 hours
Product Description
Part Numbers
18 Customer Reviews
18 4/5
16 Questions & 20 Answers

Reviews & Questions

Leave a product review for a chance to win one of our monthly $100 giveaways.
Ask or answer a question to win one of our monthly $100 giveaways.