Log In / Register
0 Checkout
Alpinestars Nucleon KR-Ci Chest Protector Inserts
Zoom
  • Alpinestars Nucleon KR-Ci Chest Protector Inserts

Please select a Size to check availability, or to add this item to your Shopping Cart or Wish List.

Select Size:

Size Chart
Price
$39.95

Select qty:

Please select a Size to view availability.
Add to Wish List

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
4.4 / 5
Protection & Durability
4.7 / 5
Features
4.4 / 5
Comfort
4.7 / 5
Style
4.6 / 5
Air Flow
4.7 / 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

Shipping

Orders $39.99 and over qualify for our fast free shipping offer. Click Here for FREE Shipping Terms and Conditions.

Please see our International Orders page for orders shipping outside the US.

We show real-time availability on this product page when you select the size/color item you want.  Most items will ship the same business day an order is placed,however if an item requires additional processing time a message will be shown indicating such.

See our full Shipping Policy for further details.

Returns

If your order arrives and it is not right, we will we'll fix it, NO NONSENSE, we promise.

Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.

See our full Return Policy for all of the pertinent details.

Write a Product Review for a chance to win our monthly $100 giveaways.
4.7 / 5.0
31 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
24
6
0
1
0
Bang For The Buck
4.4 / 5
Protection & Durability
4.7 / 5
Features
4.4 / 5
Comfort
4.7 / 5
Style
4.6 / 5
Air Flow
4.7 / 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
11 months ago
Ride:
2015 Kawasaki Ninja ZX-6R ZX636
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
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
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 1, 2016
Ride:
2015 Honda CB500F
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
3 / 5
Comfort
5 / 5
Style
3 / 5
Air Flow
4 / 5
Chest Protection; Fits, does the job
Perfect fit wit AStars track/perf jacket. I wear on the track; forget the pads are there.
For street, I take out, because I want the fell airflow of my AStars perf jacket.
Haven't crashed, but it is a very comforting gear.
For the small investment, be safe.
October 5, 2015
Purchased
1 year ago
Ride:
2007 Harley Davidson Dyna Low Rider FXDL/I
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Fit
Small
True
Large
Air Flow
5 / 5
The fitment is perfect
I replaced my Alpinestars Bionic Chest Pads with this ones, the fitment is way better and they adapt better to the body shape.

I'm wearing this on my Alpinestars Viper Jacket and the chest section now looks less robotic.

I highly recommend them.
December 1, 2015
Purchased
10 months ago
Ride:
2015 KTM RC390
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Fit
Small
True
Large
Air Flow
5 / 5
Solid Protection without Inhibiting Airflow
I use these in my Alpinestars GP Plus R jacket. They are very comfortable. I don't even notice they are there. The airflow in my jacket is just as good as it was without them.
August 20, 2015
Ride:
2015 Indian Scout
Bang For The Buck
4 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
Works great in my 1 pc Aerostich Roadcrafter light
After trying some 1 pc chest protectors my 1 pc Aerostich Roadcrafter light, I thought I'd try these instead...I added some velcro to these and put them in...instant success! Great airflow, comfortable, and now it's easy to put the suit on and off and not have to mess with adjusting the pads. They seem like a great pad for protection of course too.
May 31, 2016
Ride:
2008 BMW R1200GS
Use our Product Q&A for a chance to win our monthly $100 giveaways.

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.

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 9 questions Browse 9 questions and 57 answers
Why did you choose this?
RevZilla Store
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
Had a crash, decided that my life was worth what these cost.
John D on Sep 5, 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
I wanted more protection for my wife's Stella T-GP jacket...
ERNESTO G on Jul 21, 2016
My A-stars Lance jacket only came with foam inserts.
Christopher B on Jul 20, 2016
because they don't come with the jacket
Kuruvilla A on Jul 14, 2016
Protect my chests, fits my Alpinestars GP Plus jacket perfectly
Jmz420 on Jul 9, 2016
Just bought the blacked out Alpinestars T-GP Pro Textile Jacket and wanted that extra protection
H M on Jul 8, 2016
To improve protection of my Alpinestars race suit and newly purchased T-GP Pro Air jacket
Dean M on Jun 30, 2016
Second set. Love the adding security.
STEVEN D on Jun 28, 2016
Upgrade from foam inserts
Michael A on Jun 24, 2016
wanted to protect my chest in event of a crash
Joshua L on Jun 22, 2016
Offers great protection for a great price. Lightweight and breathable!
DoctorC on Jun 20, 2016
I always upgrade my jackets inner protection. This fits great and doesn't make my jacket bulky or awkward to wear.
Raul G on Jun 17, 2016
I have the back protector KR-2 already and this is the perfect complement for it.
hmyl on Jun 7, 2016
I have bought the Bio version for my younger brother's Drystar jacket but those doesn't fit perfectly.I bought these to go with the back protector & highly recommend it .
kong p on Jun 4, 2016
Needed some better chest protectors for my jacket
Rita B on Jun 3, 2016
Upgrade protection of my black shadow hades jacket.....
Ruscle on May 24, 2016
Upgraded protection for an already great jacket
Ariel M on May 23, 2016
Ladies like to touch my chest, so I like to keep it in one piece, just in case. Also Alpinestar's quality and goes with my Alpinestar T-GP Plus R
Brian N on May 22, 2016
Bought these because they fit the Alpinestar T-GP R Air Jacket that I purchased. just wanted better protection than what came in the jacket.
Martin K on May 20, 2016
Protection
FJ09andSV650 on May 14, 2016
Excellent protection. Breathable and not to hot. heavier than the KR-1i material but not really noticable once inserted into the jacket.
Jay C on May 12, 2016
Wanted better protection for my Alpinestars jacket
Jon C on May 4, 2016
Protection and the convenience of putting it in my jacket and forgetting about it.
Naaman B on Apr 14, 2016
The kind of protection I'm looking for especially from alpine stars
Randal S on Apr 12, 2016
To save my chest in case of a crash.
Brent E on Apr 7, 2016
Replace and upgrade the protection in my Alpinestars GP-M jacket
FRANK C on Apr 6, 2016
Wanted something a bit better than the foam inlays the jackets come with.
Trond B on Apr 1, 2016
wanted more protection
Dominic B on Mar 31, 2016
A must for the Air jacket
LIBOR W on Mar 28, 2016
Just in case.
Matthew G on Mar 26, 2016
wanted better chest protection on alpinestars jacket
james c on Mar 21, 2016
Done with Alpinestars for now, seems like their price has skyrocketed, quality has tanked
Mo K on Mar 15, 2016
upgrade my jacket
lucas b on Mar 13, 2016
Looking for good protection and these fit my jacket perfectly. Air flow is great while moving.
Reed M on Feb 29, 2016
Great brand name product for my leather jacket. Happy that I did the replacement!
Darren T on Feb 16, 2016
compliments my Nucleon KR-Ci back protector
Alex A on Feb 13, 2016
Increase protection level of T-GP R Air Jacket
Patrick L on Feb 9, 2016
I needed the extra protection for my Astar Atem Jacket.
James K on Feb 9, 2016
Protection and cost.
Douglas M on Feb 4, 2016
have capetown jacket
rando on Jan 26, 2016
So I can have ce2 protection in my jacket
Jay K on Jan 9, 2016
To upgrade the protection in the jacker
Duncan T on Dec 7, 2015
Wanted to beef up. I would like to be ready this coming summer.
Judah B on Nov 30, 2015
Recommended for jacket to increase protection
John B on Sep 10, 2016
great for my Celer and GP Pro Jackets
timothy l on Aug 23, 2016
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....
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, 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
Has anyone tried these in the dainese racing D1 jacket?
tsuyoshi t on Jan 9, 2016
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
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