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Alpinestars

Alpinestars Nucleon KR-3 Back Protector

Item: P387528
11 Read 11 Reviews 12 Q&As Write a Review

Top-of-the-line trackday back protection from Alpinestars. The Nucleon KR-3 packs back and kidney armor along with rib protection into one package. Read More

$199.95
Rebate Available! View Details

Product Details

Alpinestars Nucleon KR-3 Back Protector

Highly flexible and breathable, the Alpinestars Nucleon KR-3 Back Protector is engineered for maximum performance. Using hard shell backed with a soft viscoelastic PU foam compound, the KR3 achieves both max comfort and extraordinary impact absorption. 

Features:

  • 3 waist-to-shoulder dimensions in order to cover all body sizes
  • Lattice-structured back shell plate constructed from a high performance polymeric material blend for optimized flexibility and excellent weight-saving properties
  • Soft viscoelastic PU foam compound
  • Ergonomic design design to absorb high impacts and allow maximum breathability and air flow
  • Nucleon PU foam on the central spine for extraordinary impact absorption performance
  • Convex central hard shell provides highest protection for the spine
  • Horizontal flex grooves for adaptive fit in all riding positions
  • Adjustable rib protector constructed of high performance polymeric material blend for additional side protection
  • Shoulder blade protective padding extensions protect the acromion bone
  • Waist adjustment for customized fit
  • Slim vented kidney belt for added position stability and security
  • Adjustable, detachable elastic shoulder straps
  • Compatible with the Alpinestars Nucleon KR-C Chest Protectors (sold separately)
  • Compatible with the Alpinestars Nucleon KR-TB Protector (sold separately)
  • CE certified to EN 1621-2:2014 Level 2
Product Style RevZilla Item # MFR. Product # Availability
Product Style Black/Red / XS RevZilla Item #1242702 MFR. Product #6504718-13-XS AvailabilityIn Stock: Ships in 1-2 business days
Product Style Black/Red / SM RevZilla Item #1242703 MFR. Product #6504718-13-S AvailabilityIn Stock: Ships in 1-2 business days
Product Style Black/Red / MD RevZilla Item #1242704 MFR. Product #6504718-13-M AvailabilityAvailable: Ships in 3-5 business days
Product Style Black/Red / LG RevZilla Item #1242705 MFR. Product #6504718-13-L AvailabilityIn Stock: Ships in 1-2 business days
Product Style Black/Red / XL RevZilla Item #1242706 MFR. Product #6504718-13-XL AvailabilityOut of Stock: Enter your email address below to be notified when this item is available.

Men's Back Protector

Euro Size US Size Alpha Size Chest (cm) Waist (cm) Height (cm)
40-42 30-32 2XS 78-83.5 63-69 157-162
42-44 32-34 XS 83.5-89 69-75 163-168
46-48 36-38 SM 89-94.5 75-81 169-174
48-50 38-40 MD 94.5-100 87-82 175-179
52-54 40-42 LG 100-105.5 87-92 180-184
54-56 44-46 XL 105.5-111 92-97 185-189
58 48 2XL 111-116.5 97-102 190-194
60-62 50-52 3XL 116.5-122 102-107 190-194

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.


How to Measure

  • C Chest
    Measure around the fullest part of your chest, under the armpits, keeping the measuring tape parallel to the ground.
  • H Height
    With no shoes on, stand with your back against a wall and your feet together. Measure from the floor to the top of your head.
  • W Waist
    Measure around your natural waistline, around the top of the hip bones, inline with the navel while keeping the measuring tape parallel to the ground.
Product Description
Part Numbers
Sizing & Fit
11 Customer Reviews
11 4.5/5
12 Questions & 13 Answers
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