Alpinestars Nucleon KR-3 Back Protector Black/Red

1. High quality back protector

5

Posted by Jeremy Ross on 11th Dec 2023

I'm 5'10, 165lbs, the medium fits great. I love the side protection as well, gives you more sense of security. Another great product from A-stars.

2. Proven and tested

5

Posted by Joshua Cena on 16th Oct 2023

Product arrived to me in 3 days!!! Just in time for my track day. STG is the goat for all your motorcycle needs. Hardly noticed wearing it under my suit. Fit comfortably and gave me the peace of mind needed in case of an accident.

3. Great fit

5

Posted by Russo on 20th Jun 2023

I haven't tested it yet (thankfully) fit is great, heat molds to your body. The rob protectors are great and cannot even feel them once it is on. The elastic waist straps are height adjustable and very secure, can have it tight but still doesnt prevent easy breathing.
I have to wear it a little low because of my suit hump. I am 5'9" and 180ish the medium fits great. The shoulder straps are at their full length but that might be because I have to wear it lower. Highly recommend this back protector.

4. ventilation!

5

Posted by Stephen Husbands on 9th May 2022

Every back protector I've ever owned was claimed to "flow air to keep you cool". None have ever done that until now. The first thing I noticed heading out on track with this protector was a big cool spot spreading across my back as sweat evaporated! Awesome! Plus, it's comfortable. I'm not convinced about the side armor; more protection is great, and they didn't ever bother me, but they don't really stay in place either, they tend to slide around to the front.

5. nice, but one caution

4

Posted by Stephen Husbands on 21st Apr 2022

I bought this along with an Alpinestars Missile suit. Frankly I did no research to learn if there were different Nucleon models, I had just read in the suit description that it had provisions for interfacing with a Nucleon back protector, and when this KR-3 model was presented as something "frequently purchased along with" the suit, I just bought it. When I had the suit and back protector both in hand though, I couldn't find any way in which they would connect together nor any mention of that in literature for either product. This isn't a big deal for me, as I find having a back protector attached into the leathers makes it harder to get in and out of the suit; I am happy using the protector just strapped around my waist with the shoulder straps removed. I have not ridden in it yet so I can not comment on the extra pieces of side armor but I am happy to have them if they don't get in my way. The protector IS bulkier than my previous Dianese one; takes up more room in the suit. Adjustable waist belt position is a nice touch.

6. Nucleon KR3

5

Posted by Michael A Smith on 30th Jul 2021

Great fit. Didn’t even know it was there after a couple sessions. If your leathers are tight, that might be different.

7. Nucleon KR-3 Back Protector

5

Posted by Bob Simmerman on 1st Apr 2021

I originally purchased a KR-R protector but had a bit of an issue with it as the button that snapped to the Missile leather suit had a tendency to pop off when I was putting the suit on so I thought I would give the KR-3 a try. I like the shoulder straps and the rib protectors and this fits much better under the suit than the KR-R (both were size Small). Definitely the best back protector that I have owned to date.

8. Very comfortable

5

Posted by Cory on 14th Feb 2021

Thing works and feels like a million bucks. The guys at STG were great to work with too. Best buying experience yet, found me a new track gear provider.

9. Nucleon KR-3

5

Posted by MarkC on 24th Nov 2020

I am surprised how good this back protector feels. Once its warm, I don't even notice it under the suit. That includes the kidney protection! I do recommend putting the protector on a wearing it for 5 to 10 min. before sliding into your suit. Once its warm its surprisingly supple.