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Alpinestars Nucleon KR-1 Road Back Protector

Item: P295325

Race-level back protection for the street rider. The Alpinestars Nucleon KR-1 Road Back Protector flows air and customizable waist fit. Read More

$169.95
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Product Details

Alpinestars Nucleon KR-1 Back Protector

The Nucleon KR-1 hybrid back protector incorporates race-oriented back protection that is CE certified level 2 to the latest back protector standard revision (EN1621-2:2014). Featuring hard-shell vertebrae protection and high energy absorbing viscoelastic memory foam, this innovative hybrid back protector is uncompromising in safety and performance. Ergonomically profiled for sport riding with superb ventilation and a special waist adjustment belt for a customized fit.

Sizing Info:

Waist to Shoulder Length (in)  KR-1 Protector Size
16 XS
17.25 SM
18.5 MD
20 LG
21 XL

Product Style RevZilla Item # MFR. Product # Availability
Product Style XS RevZilla Item #1012245 MFR. Product #6504515-12-XS AvailabilityIn Stock: Ships within 24 hours
Product Style SM RevZilla Item #1012246 MFR. Product #6504515-12-S AvailabilityIn Stock: Ships within 24 hours
Product Style MD RevZilla Item #1012247 MFR. Product #6504515-12-M AvailabilityIn Stock: Ships within 24 hours
Product Style LG RevZilla Item #1012248 MFR. Product #6504515-12-L AvailabilityIn Stock: Ships within 24 hours
Product Style XL RevZilla Item #1012249 MFR. Product #6504515-12-XL AvailabilityIn Stock: Ships within 24 hours

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Product Description
Part Numbers
Shipping & Returns

Reviews & Questions

4.9 / 5.0
9 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
8
1
0
0
0
Bang For The Buck
4.7 / 5
Protection & Durability
5.0 / 5
Features
4.9 / 5
Comfort
4.8 / 5
Style
5.0 / 5
Air Flow
5.0 / 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
Light weight, forms to body, added chest protection A+
NOTE: I have not crashed wearing this item.

Before I purchased this back protector I was using the Icon CE Stryker back protector. This protector was heavy, did not breath well and had the old style fuzzy velcro, which naturally got destroyed within six months of use.

I have only ridden with this back protector on the street, but it is incredibly comfortable, I almost forget it is there! It is very light weight, forms to your back, and can include a chest protector (KR-C) which I purchased as well. I like the chest protector in addition to the back protector because it removed the shoulder straps from going underneath your armpits.

The waist strap is made with the new style velcro which is much more durable then the old fuzzy stuff. It is also adjustable and can be moved up or down to fit your hips.

FITMENT: I am 6ft even and 160lbs. I have a 32 inch waist. I went with the medium size back protector and Im glad I did. It is maybe an inch or two small, but I figured it would better to purchase something smaller than having a huge bulky back protector. I had to move the waist band adjuster all the way to the bottom but I think it fits perfectly. I haven't tried a large size to compare, but if you are over 6 feet I would recommend a larger size.
January 19, 2016
Ride:
2009 Honda CBR600RR
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
Amazing. Got me safely through a tough crash; buying another one!
Amazing. Got me safely through a tough crash; buying another one!

It's comfortable, flows air well.

I crashed into a Norwegian moose with this thing on, no back problems whatsoever. I got a concussion and broke my jaw, but my back was fine.

I'm adding the chest protector and the tailbone protector as well.

I'm 6'2", 190 lbs and I got the Large, fits very well.
September 6, 2017
Bang For The Buck
4 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
4 / 5
Style
5 / 5
Air Flow
5 / 5
Light, tight, good ventilation
This back protector is tight, light and has good ventilation. I also appreciate that it is one solid piece, and still shapes tightly to the body.

I use this back protector with the KR-C chest protector, which makes it even tighter. I wear it under a rather short and tight Dainese Laguna seca jacket - no problem.
August 5, 2015
Bang For The Buck
4 / 5
Protection & Durability
5 / 5
Features
4 / 5
Comfort
4 / 5
Style
5 / 5
Fit
Small
True
Large
Air Flow
5 / 5
Nice
Very nice back protector, you will need to spend some time adjusting strapes, but once you've done, it will fit you perfectly
November 12, 2016
Purchased
over 2 years ago
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
Perfect
I bought this and the chest protector and I wear it all the time! Very comfortable, flows a ton of air as long as your jacket does. I had an off last year on the street that was pretty bad and I had a couple bruises but never even got the wind knocked out of me. Maybe it was this equipment but I will never ride without it that's for sure.
April 4, 2017
Purchased
over 3 years ago
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
Good buy
Nice solid construct. The straps help keep the protector sit firm on the back. Plus you can attach chest protectors too. I highly recommend adding the chest protectors as well. Over all happy with the buy
April 15, 2018
Purchased
11 months ago
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
Good Product
I bought this item last week and used it on an easy ride in the canyons. It feels pretty light and comfortable. At first when I put on my suit and zipped it up it felt like it keeps moving up but after 2 min I got used to it. You wont even feel you have it on.
April 14, 2015
Ride:
2014 BMW S1000RR
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
5 / 5
Comfort
5 / 5
Fit
Small
True
Large
Air Flow
5 / 5
Near Perfect Back Protector
This is an amazingly well thought out product. I have metal bolts in my back, and I wanted the extra protection of a hard-shell protector. The KR-1 conforms easily to the back and is fully ventilated, yet I'm convinced that a blow from a ball pein would not hurt. The ventilation is complete - the (slimming) belly band is perforated, even through the Velcro patches. Nice touches are the swivels in the shoulder straps (which have proper sewn-on ladder adjusters) comfortable edging at the neck line, and a scale for adjusting the belt height, Size by your height, not jacket size, you don't want it too long.
May 9, 2018
Purchased
9 months ago
Ride:
1978 Honda CX500
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
5 / 5
Upgrade the Waistband Alpinestars
Really my only complaint is the weak velcro and waistband adjustment system used on this back protector.

Forcefield does a much better job with a better 2 tier adjustment system, and stronger velcro.

A* doesn't help itself with the heavy red rubber on the end of the band, which encourages it to peel apart by it's weight. That rubber serves no purpose but to place a logo on, which this already has a ton of. What the heck, Alpinestars?
January 5, 2019
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 8 questions Browse 8 questions and 24 answers
Why did you choose this?
RevZilla Store
offers good back protection, comfortable to wear under leather jacket. stays in place.
Basil C on Apr 23, 2017
Great protection for the track.
Matt M on Mar 18, 2017
offers good back protection, comfortable to wear under leather jacket. stays in place.
Basil C on Apr 23, 2017
Super breathable and comfortable.
M O on Apr 13, 2017
Great protection for the track.
Matt M on Mar 18, 2017
It has good reviews for comfort, appears not too bulky, and is CE 2 rated.
Patrick R on Feb 19, 2017
Excellent back protector and breathable mesh, during hot weather.
Luis H on Feb 11, 2017
ce rated, required at race track, comfortable
S T on Nov 1, 2016
I have not been a fan of the snap back back protectors under my suit. I borrowed a friend's back protector at the track that had the shoulder straps and it was much better for me. I hope I like this one! Cant wait to see how it feels under my suit. Thanks!
Kacie W on Jun 28, 2016
Great protection with a thin design! It is also lightweight and breathable.
James P on Apr 28, 2016
Was going back and forth whether I needed this or not since the track organization doesn't require it. The more people I talk to the more I'm convinced that I don't want to take a chance with my spine. Also, I choose this one over the KR-R since I like the shoulder straps and not wanting to deal with the snap ons.
Jairo M on Apr 11, 2016
Good independent back protector for with any riding jacket. I purchased the Rev'It! Concorde and did not like the feel of the Seesoft Back Protector insert. I decided to go with a dedicated back protector so that I can wear the jacket off the bike as well.
David L on Jan 31, 2016
Wanted something that I could wear with or without my jaws jacket
Harpreet D on Jan 19, 2016
Back Protection and ability to use with all my motorcycle jackets that have minimal to no back protection
Jeff K on Nov 22, 2015
Wanted a force field back protector but since i don't live in the US this is the best thing i can get..
Adit r on Sep 21, 2015
Great brand that i trust.
Jacobus V on May 7, 2015
Super breathable and comfortable.
M O on Apr 13, 2017
It has good reviews for comfort, appears not too bulky, and is CE 2 rated.
Patrick R on Feb 19, 2017
Hey !

I am comparing this with the Forcefield Back Protector Pro L2 EVO. I am most concerned about tailbone protection. Do you know if one has more tailbone protection than the other?

I am 5'8" 150 lbs. Any idea on what size to get? Should I go for a large to get the most protection?

Thanks!
Alexander M on Jul 23, 2015
BEST ANSWER: Im 5'8 and around 155lbs and I actually got a size small and it fits perfect. The tip of the protector ends about an inch below my tailbone area.
Can i take straps off and slip into back pocket of my A.S.s jacket?
A shopper on Apr 7, 2015
BEST ANSWER: Yes you can take the straps off. The shoulder straps unhook at both ends. The waist strap pieces are attached at the back protector with velcro, and can also be removed. I would check the length to see if it fits in the jacket. FYI, they sell an insert version of this protector, that is less expensive, and meant specifically for inserting into a jacket.
what is the length of the size Small protector?
A shopper on Apr 16, 2018
Does armor like this have a life span and if so how long ?
A shopper on Sep 5, 2018
BEST ANSWER: Keep it out of the sun and constant moisture changes and it should last longer than you.
How many pounds is it?
AP/Alejandro Noe G on Aug 9, 2017
BEST ANSWER: I don’t have a scale that registers this low but I’d say around 1.5 pounds.
Hi there. Does the Nucleon KR-1i Protector come with this product or is it sold separately? I have previously bought the Nucleon KR-1i Protector so i am looking for the outter shell and straps.

Thanks.
Charbel N on Oct 7, 2015
BEST ANSWER: Short answer: no.

Long answer. The KR-1i is a smaller back protector that fits into a pocket in the back of a matching jacket. The KR-1i is not designed to be adapted for use without said pocket.

The KR-1 is a full length protector that generally reaches from just below the base of the neck to the base of the spine. It has attached straps for the shoulders and kidney area so that it can be worn independent of jacket style or manufacturer.
Hi I have just bought this new back protector. I'm wearing a Alpinestars jaws Jacket. Should i remove the foam padding that is in where the slide in back protector would go as I'm finding the jacket fit is really tight now that I have the Back protector on?
Cheer Mark.
Mark S on Jun 12, 2015
BEST ANSWER: Hi Mark, I think if you use this back protector, you could do away with the one that comes with the jacket especially if that makes it more comfortable. However, if you don't use the Nucleon I would at least put the foam back pad back in there (or consider upgrading it). My 2 cents. Good luck!
9 Customer Reviews
9 5/5
7 Questions & 10 Answers
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