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Alpinestars Nucleon KR-Ci Chest Protector Inserts
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  • Alpinestars Nucleon KR-Ci Chest Protector Inserts

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Video Review

Alpinestars Nucleon KR-Ci Chest Protector Inserts Videos

Alpinestars Nucleon KR-Ci Chest Protectors

The Nucleon KR-Ci features an easy-to-use divided chest protector insert for men, certified to prEN 1621-3:2013. It is highly ventilating, very lightweight and the ergonomically designed protector is excellent for everyday riding.

Compatible with all Alpinestars jackets and race suits equipped with chest protector pockets (most Alpinestars products).  The Nucleon replaces its predecessor the "Bionic Chest Pad" and fits any product that the Bionic Chest Pad would have fit.

4.7 / 5
Bang For The Buck
4.5 / 5
Protection & Durability
4.8 / 5
Features
4.4 / 5
Comfort
4.7 / 5
Style
4.5 / 5
Air Flow
4.6 / 5
Fit
Small
 
Large
Product Style RevZilla Item # Manufacturer Product # Availability
XS-SM 1012239 6702115-10-XSS In Stock: Ships within 24 hours
MD-XL 1012240 6702115-10-MXL In Stock: Ships within 24 hours

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4.7 / 5.0
39 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
30
8
0
1
0
Bang For The Buck
4.4 / 5
Protection & Durability
4.8 / 5
Features
4.4 / 5
Comfort
4.7 / 5
Style
4.5 / 5
Air Flow
4.6 / 5
Fit
Small
True
Large
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
4 / 5
Comfort
5 / 5
Style
4 / 5
Air Flow
5 / 5
If you fall down, go boom...it won't hurt as much.
Zup Zilla Nation,
This is my overview of the new Nucleon KR-Ci, CE 1, chest insert from Alpinestars.
Note that most of this overview is compared straight up to the A*’s Bionic chest inserts, which I have in both my Tech-1R and GP Tech Air leather jackets.

Ok, on with it.
First off the packaging is kinda pimp I would have to say. A two sided heavy “zip-lock” type bag that you can reuse for other motorcycle type things.

Sizing:
As you probably already know they come in two sizes, XS-S and M-XL, to best fit the application you are looking for. I currently own both sizes. Why? Well I wear a 48 Eu/ 38 US in just about all Alpinestars(for a “Race Fit”) and have always upgraded my chest pad with the Bionic chest armor. I followed Anthony’s size description and ordered a set of XS-S for jacket size 50EU and under. I got it and found them to be smaller then the stock foam and the Bionic chest inserts. They fit pretty good in the armor pockets, and very comfy, but they moved around more then I wanted them to. Now note, on me and my Alpinestars GP Tech Air jacket, it still covered most of my lowers chest and wrapped around my ribs which was fully covered. I was just so used to more coverage over the upper chest I wanted to know if the M-XL would fit better. Hi-Viz helped me out, with epic service like always, and I got a set of M-XL that fit the armor pocket perfectly. The Nucleon M-XL are the exact same shape and size of the stock foam and the A’s Bionic chest inserts. So if your looking for a straight up swap for the stock chest foam or the Bionic chest the size you will want is the M-XL.

Feel:
They mold to the shape of your body like the OEM foam, but give you the added protection and a new CE1 rating. I think they weight maybe a little less then the Bionic inserts. And there is much more air flow compared to the Bionic chest...I mean it’s like night and day...you have a fan on your bare chest kind of air flow. So if you don’t want to feel it at all and you your 50EU/40US then get the XS-S. If you don’t mind a little bulge and you can kinda feel it then get the M-XL. Both will fit and do the job in your jackets.

Looks:
In my jackets, with the XS-S and a Knox Ageis back protector, you can’t even feel or see it from the outside of the jacket. With the M-XL, you can see a very slight smooth lump from the edges...just thought I would add this if that sort of thing bothers you.

Overall, I really like it. It feels really good and the air flow is great. I used the XS-S pair as replacement hip armor in my A*s V-twin leather pants.

Hope this helps...Ride Safe,
MikeyD

Photo included is of the stock foam and the Nucleon M-XL.
April 9, 2015
Ride:
2011 Kawasaki Ninja ZX-10R
Bang For The Buck
4 / 5
Protection & Durability
4 / 5
Features
4 / 5
Comfort
5 / 5
Style
5 / 5
Fit
Small
True
Large
Air Flow
5 / 5
Bigger
i put it in my Alpinestars T-GP R Air Jacket and it feels kind of loose in the jacket, thought it might have been a tighter fit, still useful, my boobies went up a cup size
October 26, 2015
Purchased
 1 year ago
Ride:
2015 Kawasaki Ninja ZX-6R ZX636
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
Chest Protection
I upgraded the chest padding in my AStar Jaws perf jacket with the KR-CI protector. I like how the material molds to your body I can barely notice that it is in my jacket.
October 22, 2015
Ride:
2015 Ducati Monster 821
Bang For The Buck
4 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Fit
Small
True
Large
Air Flow
4 / 5
Not sure why these don't come standard
These are great. They give me more confidence that if anything happens, I have a bit more protection for what it's worth. And I'll take it. I have three different Alpinestars jackets and I've swapped these out on all of them. I feel these should be standard from AStars instead of the crap foam inserts that come instead.
May 25, 2017
Bang For The Buck
3 / 5
Protection & Durability
5 / 5
Features
3 / 5
Comfort
5 / 5
Style
4 / 5
Fit
Small
True
Large
Air Flow
5 / 5
Great Upgrade
Ordered these in a XS-SM to replace the chest foam in my 2014 GP-R. Slightly smaller than the foam, but definitely more durable. I don't think the size would be an issue, but if you feel like you need that little bit of extra coverage, I would get the next size up. It will still fit.

You can't even feel these in the jacket. Small price to pay for peace of mind.
August 14, 2015
Ride:
2006 Honda CBR600RR
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
Can't tell when it's there, can when it is not!
I am happy I went with the advice somebody else on here gave about going with the MED-XL insert regardless of size chart because that is what the stock size pad was. Fit is very snug inside of my GP Plus R Perf jacket and the high ventilation is very noticeable! What really shines is the level of protection I can feel inside of the jacket when you 'test' the area yourself, yet I forgot it is even there when I am wearing it 10 minutes later. Must have for ANY Alpinestars jacket.
May 15, 2015
Ride:
2009 Kawasaki Ninja 650R
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Fit
Small
True
Large
Air Flow
5 / 5
Great chest protection
Bought theses to upgrade the chest protection in my A* GP Plus R jacket. Ordered the large size and they fit perfectly in the chest pockets of the jacket.
August 29, 2015
Ride:
2015 Ducati Monster 821
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
MD-XL fits in large Alpinestars T-Jaws Air jacket
MD-XL fit just fine in my large Alpinestars T-Jaws Air jacket. Fairly slim inserts but definitely makes the chest area just a bit more snug.
March 2, 2016
Ride:
2015 Honda CB500F
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Comfort
5 / 5
Fit
Small
True
Large
Air Flow
5 / 5
I use these in my Alpinestars Viper AIr jacket and my Dainese Tempest D-Dry Jacket. They have a nice flex to them so they don't ever feel in the way.
October 1, 2016
Purchased
 1 year ago
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Fit
Small
True
Large
Nice product
As expected. No problems. Fits well in my Alpinestar jacket.
November 25, 2016
Purchased
 1 year ago
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Have a functionality, fit, or otherwise product-specific question about the Alpinestars Nucleon KR-Ci Chest Protector Inserts? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

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Browse 10 questions Browse 10 questions and 61 answers
Why did you choose this?
RevZilla Store
Wanted to improve the protection of my leather cold weather and my Textile warm weather AStars jackets. Definitely worth the $$$
Robert K on Sep 13, 2017
Upgrading the chest protector on my alpinestar jacket.
Endro A on Aug 27, 2017
Wanted to improve the protection of my leather cold weather and my Textile warm weather AStars jackets. Definitely worth the $$$
Robert K on Sep 13, 2017
Need protection
Kevin L on Sep 6, 2017
Upgrading the chest protector on my alpinestar jacket.
Endro A on Aug 27, 2017
More protection
U R on Aug 5, 2017
I have an Alpinestar jacket and wanted more protection
Christopher R on Jul 29, 2017
To upgrade the track 2 vest
Barry H on Jul 21, 2017
My ribs are kind of nice
Easton P on Jul 19, 2017
Upgrade for T-GP Plus R v2 jacket, Flexible, comfortable, CE L2, A* quality.
Trishul R on Jul 11, 2017
To improve protection
bruno s on Jul 5, 2017
I haven't had chest protector inserts before. The reviews for air flow were good, so I'm trying them.
Marc M on Jul 1, 2017
I wanted the best protection possible from my A-Stars Jacket
Brandon U on Jun 24, 2017
Looking for added protection. I already purchased the matching back protector and am very pleased with the fit, quality and comfort of the insert.
Calvin C on Jun 9, 2017
Chose these to beef up the protection in my Alpinestars GP Plus R jacket, which I already have the Nucleon Back Protector armor in and would highly recommend!
Justin G on Jun 4, 2017
Hoping for high air flow along with high level protection in summer.
Harold H on May 30, 2017
This fits into my Alpinestars Durban suit as an upgrade
Daniel D on May 23, 2017
Fits the Viper jacket and added protection over critical organs.
Darron H on May 21, 2017
pseudo-skis
Mark A on May 20, 2017
Improved safety
Victor B on May 19, 2017
Fits in my new AS jacket!
N E on May 19, 2017
I have a jacket but it doesn't has chest protections. That item easily fits my ALPINESTARS HOWLER jacket
Alexandr U on May 9, 2017
Safety
Enrique V on May 7, 2017
wanted extra protection for my jacket.
Jeremy J on May 2, 2017
Safety
Mario G on Apr 26, 2017
Chose this product to go with the ALPINESTARS JAWS LEATHER JACKET
A C on Apr 19, 2017
So I don't break my ribs.
Thomas D on Apr 13, 2017
To go with Alpinstars race suit.
Andrew M on Apr 3, 2017
Upgrade the chest protectors in the Alpinestars Andes v2 Drystar Jacket
William N on Mar 26, 2017
Watched a guy break 4 ribs and a bunch of other bones from hitting his chest at super low speed on his sportbike bars, wish they made these in ce2.
ian o on Mar 22, 2017
Added protection
Thomas C on Mar 12, 2017
finally was able to get these on my jacket .. i use them in my leather jacket during the winter riding season then switch them to my summer jacket with no problem ,, i feel protected and they feel great
jesus S on Mar 6, 2017
CE 2 and still a good deal. Help Protect vital organs, my leather jackets had none...
T S on Mar 3, 2017
Purchased the back piece from this series and was pleased enough to want the front covered with the same material also.
joshua g on Mar 1, 2017
Perfect fit in my Alpinestars mesh jacket and I feel secure that they'd protect me if I ever need them to.
Scott P on Feb 28, 2017
Looking for added protection in my A* leather jacket.
William N on Feb 19, 2017
Wanted the best protection possible for my chest and upper body both commuting in city traffic and also bashing into trees dual sport riding.
Nathan D on Feb 1, 2017
Video's were helpful and I wanted to upgrade the chest protection in my new jacket.
Ryan I on Jan 5, 2017
chest insert required in vest which is not included on vest
Regie G on Jan 2, 2017
upgrade for race suit, better then the OEM pads. Better durability longer lifespan, and with the humidity it is also a better year round product, not just for one season
Dan T on Dec 26, 2016
CE approved, not just foam pads.
The Sir on Dec 11, 2016
uilt for the jacket I chose, Valparaiso 2
Cory N on Nov 17, 2016
I want to protect my chest as well as my back. Great reviews.
Virgil J on Nov 15, 2016
safety is first
Jorge R on Nov 10, 2016
Haven't needed them, hope I never do, but they fit in the jacket nice, provide Nice air flow.
Wayne R on Sep 10, 2016
Recommended for jacket to increase protection
John B on Sep 10, 2016
Had a crash, decided that my life was worth what these cost.
John D on Sep 5, 2016
great for my Celer and GP Pro Jackets
timothy l on Aug 23, 2016
To upgrade the armor in my jacket.
ph001c on Aug 22, 2016
Fits perfectly into the chest pockets in my A* GP R Plus jacket. I feel much safer with this as opposed to the thin layer of foam that comes with the jacket. Also seems to provide some rib protection.
Duane N on Aug 18, 2016
The insert that the jacket comes with is just a place holder from this superior protection, when I went down my first time I was thankful I was wrapped in CE rated gear under my alpinestar GP-R leather jacket, walked away unscaved, invest in your life it's worth it.
Jonathon D on Aug 17, 2016
I've got an AStars jacket, and plan on buying another later down the line, so I'm beefing up my protection!
JD M on Jul 24, 2016
Need protection
Kevin L on Sep 6, 2017
More protection
U R on Aug 5, 2017
Hi,

How does this insert compare in regards to protection to the bionic chest protector?

Thanks.
A shopper on Feb 27, 2015
BEST ANSWER: I purchased these to go into a "sports" jacket and they work great, dont have to keep taking them in and out, however if you going to use a race suite, I would suggest the bionic chest protector as it is better chest protection as it covers the whole chest....
Hello, would anyone happen to know if these would fit a Dainese City Guard jacket? The pads that came with the Dainese are waay too thick and bulky, I have already replaced the back pad with a D30 and it is a huge improvement.
A shopper on Jun 4, 2015
BEST ANSWER: I just got a Dainese Temptest D-Dry jacket and am using these inserts instead of buying Dainese and they fit fine.
Has anyone tried these in the dainese racing D1 jacket?
tsuyoshi t on Jan 9, 2016
BEST ANSWER: I have them in my Dainese Tempest D-Dry and they fit fine
Will this fit in the Jaws Jacket?
Evan M on Feb 26, 2015
BEST ANSWER: Yes, I own a Jaws Jacket and recently added those inserts.
Hello, can you please tell me for a USA40/EU50 sized alpine star ATEM jacket what is the size for these chest pad, thank you :) ?
rahul s on Jun 14, 2016
BEST ANSWER: Hi! I'm not sure about the ATEM jacket, but I have a USA 40 sized Alpinestars GP Plus and I ordered the MD-XL size chest protector. Fitting was a bit tricky at first but then since these things are pretty bendable, I just bent it a bit to so it fits into the jacket. (don't worry it will stretch back to its original size once it's in the jacket) Fits nice and snug
Does anyone know if these will fit in last years motegi one piece suit?
Edward P on Aug 1, 2015
BEST ANSWER: I use a set of Nucleon in my Tempest D-Dry coat and they fit fine into the pockets.
Why would these be better/different than the Bionic Chest Protector plates?
Dan A on Apr 2, 2015
BEST ANSWER: These are ce rated 1 gives you more peace of mind of protection and these flow air better due to venting holes and they contour to your body better then the stiff bionic pads so these should probably feel more comfortable if you have a snug jacket just my 2 cents
Are these the same size or just the same as the bionic ones?
A shopper on Nov 30, 2015
BEST ANSWER: I bought an atem jacket size 48 and the md/xl fit my pockets perfect. 5'10" 160 lbs. the md/xl are the same size as the bionic chest inserts
Where are these made in?
A shopper on May 11, 2017
BEST ANSWER: I don't understand the question. If you are asking the country that they are made in I have know idea because I didn't look when I purchase them. As far as the material they are a hard plyiable rubber