Alpinestars
Alpinestars Nucleon KR-3 Back Protector
Item: #572763 | Part Number: Not Selected$289.95 - $344.99
Description
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...
Alpinestars Nucleon KR-3 Back Protector Item # 572763
Description
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
Part Numbers for Alpinestars Nucleon KR-3 Back Protector
Comparison Chart
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| Model | Nucleon KR-Cell | KR-R Cell | KR-1 Cell | Nucleon KR-3 |
| Starting at | $165 | $230 | $250 | $290 |
| Benefits | Injected triple layer compound | Extremely lightweight & breathable | For more aggressive sport riding | High impact dissipation |
| Material | Polymer, bio-foam | Polymer, viscoelastic memory foam | Polymer, Hard plastic lattice, Bio foam | Polymer, viscoelastic memory foam |
| Compatibility | Nucleon KR-C
Nucleon KR-TB |
Nucleon KR-TB | Nucleon KR-C
Nucleon KR-TB |
Nucleon KR-C
Nucleon KR-TB |
| Protection | Good | Good | Better | Best |
| Airflow | Good | Better | Better | Best |
| Flexibility | Good | Best | Better | Better |
| Certification | CE Level 1 | CE Level 2 | CE Level 2 | CE Level 2 |
Reviews
Rated 5 out of
5
by
Benny from
Amazing protector
Bought this 2 years ago, had track day crash at 150kmh, did a couple tumbles. Back is A1. Fits good, doesn't bother me while riding
Date published: 2020-07-22
Rated 4 out of
5
by
Jonny Gsxr from
It's a bit uncomfortable while standing/walking around, but after some adjustments I can't tell its there when I'm in a riding position. I bought a large based on the size chart, probably could have gone with a medium, it might be best to try one on before ordering. Can't really complain though, looks like it protects well, feels like it vents well, and you can't tell its there while riding.
Date published: 2019-09-10
Rated 5 out of
5
by
volkvin from
Swapped KR-R for this. Cant recommend enough!
Bought this to replace KR-R to help restrict movement of the back protector. Shoulder straps are great and kidney armor is great bonus. Whole protector once put under a suit cannot be felt and does not cause any restrictions.
Date published: 2019-04-20
Rated 5 out of
5
by
2by4 from
Great protector
Excellent fit and protection. As they talk about in the video reviews this protector totally moulds into your back just seems to disappear under your jacket/suit, including the side panels.
Waist strap acts as a kidney belt and compresses that area just a right amount.
Note in some of the videos the guy talks about the fact that the length of the protector itself comes in 3 sizes. Extra small is one size, small and medium is the next, and large and extra-large are the longest length. The strapping varies with each size.
Probably getting a sport bike again but got this for use with my Harley - doing a cornering course on a track and needed a CE Level II protector. I wear it all the time though, it’s so comfortable.
Date published: 2021-04-03
Questions
Will the Alpinestars Nucleon KR-C Chest Protector Harness fit this back protector?
Yes, this item is compatible with all of the Nucleon KR-C Chest Protectors
Date published: 2019-01-03
Im 181cm tall, 85kg weight, would Large fit me or Medium?
Difficult to say for sure since it depends where your body weight is distributed. We recommend using the provided size chart and the waist/ waist-to-shoulder measurements to determine the best fit.
Date published: 2021-10-27
What are the sizing options? Where do you measure and what are the measurements for the sizes available? I'm 5' 8", going to be using for competative racing. Would a medium be the one for me?
Yes according to sizing chart that's the one
Date published: 2019-04-30
Are the rib protectors removeable?
The rib protectors can be removed. I've left mine on, I don't notice them when riding
Date published: 2021-12-23