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Alpinestars Nucleon KR-1i Back Protector Insert

Item: P295328

The Nucleon KR-1i form fits to your body. Great airflow and lightweight, the Nucleon KR-1i replacement back protector insert is CE Level 2. Read More

$79.95
Learn More

Product Details

Alpinestars Nucleon KR-1i Hybrid Back Protector Insert

The Nucleon KR-1i Hybrid Back Protector Insert is CE certified Level 2 to the latest back protector standard revision (EN1621-2:2014). Fusing together a lightweight, perforated hard shell and energy absorbing foam, this hybrid protector insert offers excellent impact resistance while being flexible and anatomically contoured. With its innovative cooling airflow channel system the Nucleon KR-1i Hybrid Back Protector Insert offers optimized levels of protection and comfort for sport and street riding.

Fitment:

  • Women's Stella Jackets:
    • XS-SM: Small Nucleon
    • MD-2XL: Medium Nucleon
  • Men's Jacket:
    • 48-50 or XS-MD: Medium Nucleon
    • 52-64 or LG-4XL: Large Nucleon 
Product Style RevZilla Item # MFR. Product # Availability
Product Style SM RevZilla Item #1012260 MFR. Product #6504115-12-S AvailabilityAvailable: Requires 2-3 business days of lead time prior to shipment
Product Style MD RevZilla Item #1012261 MFR. Product #6504115-12-M AvailabilityAvailable: Requires 1-3 business days of lead time prior to shipment
Product Style LG RevZilla Item #1012262 MFR. Product #6504115-12-L AvailabilityAvailable: Requires 1-3 business days of lead time prior to shipment

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Product Description
Part Numbers
Shipping & Returns
Product Description
The Nucleon KR-1i form fits to your body. Great airflow and lightweight, the Nucleon KR-1i replacement back protector insert is CE Level 2. Read More
Part Numbers
Tap To View Part Numbers
Shipping & Returns
Tap To View Shipping & Returns Details

Reviews & Questions

4.8 / 5.0
61 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
49
12
0
0
0
Bang For The Buck
4.6 / 5
Protection & Durability
4.8 / 5
Features
4.4 / 5
Comfort
4.7 / 5
Style
4.7 / 5
Air Flow
4.8 / 5
Fit
Small
True
Large
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
Useful
hopefully i never have to use it in a crash, but like a condom, better safe than sorry
October 26, 2015
Purchased
over 2 years ago
Ride:
2015 Kawasaki Ninja ZX-6R ZX636
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
Worth it!
I love this product. I also purchased the Alpinestars Stella Eloise Air Jacket in a size Small and the Alpinestars Nucleon KR-1i Back Protector Insert in a size Small. This is a bit thicker than my previous protector, which takes up more space in my jacket. I ordered my new jacket a size up and it fits perfectly. This protector is made with a memory style material so it form fits to my body. It has great airflow and it's light weight so it's worth the few extra bucks to upgrade. Keep in mind, if your jacket is already tight through the chest, this may not fit comfortably.
June 15, 2015
Ride:
2014 Kawasaki Ninja 300 ABS
Bang For The Buck
4 / 5
Protection & Durability
5 / 5
Features
4 / 5
Comfort
4 / 5
Style
5 / 5
Air Flow
4 / 5
Great back protector insert
Fits my Alpinestars T-GP Pro Air perfectly. High level of protection with minimal weight and bulk plus fair amount of wind flow. Comfortable -- don't really notice it's there while riding. Great product although a bit pricey.
August 2, 2016
Ride:
2004 Yamaha FZ6
Bang For The Buck
4 / 5
Protection & Durability
5 / 5
Features
4 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
4 / 5
Can't tell it's even there
I purchased this vs the KRR or KR 1 because of price and the fact it goes into my jacket instead of strapped onto my body. I only do basic track days at this point and may upgrade to the Nucleon KR1 later as I improve. But the quality and safety rating of the KR1i is about as good as the others. I cannot even tell its in my Atem jacket unless I turn sideways in a mirror. The air flows the same as it did with the jackets factory supplied foam insert. I hope I never need to know how well it works.
May 29, 2016
Purchased
1 year ago
Ride:
2014 Ducati Monster 1200 S
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
Great fit
Makes jacket slightly heavier but not bad at all. Flows air well also
November 30, 2015
Ride:
2008 Honda CBR600RR
Bang For The Buck
4 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
A Practical and Affordable Insurance Policy
Taking a point off bang-for-buck is probably because I'm unsure how 1KN of force translate into nearly double the price? But since it's something that would probably keep my back and spine from shattering, it's either go big or go to the hospital. Of course, the while plastic insert increases the protection level, but adds a touch more of rigidity, the edges still feel soft and with it facing my back, it conforms exactly to it without being a radiator I'm carrying on my rides.
July 20, 2015
Purchased
over 2 years ago
Ride:
2015 Honda CB500X
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
Excellent lightweight protection
I installed a medium size of this back protector in the zippered pocket of a Vanson leather jacket, also size medium. It doesn't fit the pocket well (too loose), but it wasn't made for this jacket either. Nevertheless, it doesn't move around while riding. After a couple of rides, I literally cannot tell it's there anymore. It doesn't affect comfort at all. My jacket has zippered airflow panels, and the back protector does not impede ventilation. I recommend this to anyone who wants the extra peace of mind of added spine protection.
June 11, 2015
Ride:
2009 Buell XB12Scg Lightning
Bang For The Buck
4 / 5
Protection & Durability
5 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
5 / 5
Unnoticeable noticeable protection
Fits perfectly in both my Alpinestars textile and leather jacket. The only time I noticed the back protector was the first time I inserted it in the jacket, simply because the stock insert is soft and mushy. Air flow is fantastic. I'm riding in 75-85 degree weather and it adds no discomfort.

I can't say whether or not it actually works, fortunately, but it does add peace of mind in case I go down.

Trying to think of anything realistically negative about the product but nothing comes to mind.
October 12, 2015
Ride:
1997 Yamaha XV535 Virago
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
4 / 5
Comfort
4 / 5
Style
5 / 5
Air Flow
5 / 5
Great price and definitely addd a sense of protection.
Bargain priced, CE rated protection. Doesn't get any better
September 15, 2015
Purchased
over 2 years ago
Ride:
2012 Ducati Monster 796
Bang For The Buck
5 / 5
Protection & Durability
4 / 5
Features
4 / 5
Comfort
5 / 5
Style
5 / 5
Air Flow
4 / 5
Very worth it to have your back protected
I got this back protector to be used on the GP plus Air perforated leather jacket and it fits good. I don't even notice that the back protector is on there when you wear it. Little price to pay for some good back protection. I would recommend this to anyone.
October 5, 2015
Ride:
2013 Honda CBR600RR ABS
61 Customer Reviews
61 5/5
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28 Questions & 22 Answers
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