Alpinestars Nucleon KR-3 Back Protector Review and Sizing Info from STG
I wear a size Large in the Alpinestars Nucleon KR-3 Back Protector at 5' 11" 200lbs with a 32-33 in waist with a size 56 Euro / 46 US suit. It is comfortable under the suit, almost invisible really. - Brian Van
WOW is where I am going to start. I have worn a lot of different back protectors over the years now and this one has moved to the top of my list. The base material Alpinestars uses for the Nucleon KR-3 Back Protector softens as it warms which allows it to move with you so well you forget it is there. The waist belt is adjustable to raise or lower the protector on your body, the straps are adjustable and removable (I prefer no straps so I take them off) which allows you to dial the fit in. Shields in the kidney/rib area (removable and adjustable) are included and slide over the wasit belt. At first I was sure that I would be taking these off, that all changed once I rode with them in and never felt they were there. This is best back protector I have used thus far and would recommend this to any track rider for sure. - Brian Van
This race suit will deliver the performance and protection needed for any level of motorcycle racing, track day riding or street riding.
Back protector CE certified to EN 1621_2:2014 LEVEL 2.
The Alpinestars Nucleon KR-3 Back Protector is a product we believe in and support with our STG Factory Ride Guarantee. This item includes FREE Shipping for Exchanges and enchanced product support from Team STG. Offer available for US Domestic Orders only. Click here for program details.
Alpinestars Nucleon KR-3 Back Protector Black/Red
Product Features:
- Back protector CE certified against EN 1621_2:2014 LEVEL 2.
- Back protector developed in 3 waist to shoulder dimensions in order to cover all the body sizes.
- NEW lattice structured back shell plate is constructed from a high performance polymeric material blend for optimized flexibility and excellent weight-saving properties.
- NEW Soft Viscoelastic PU FOAM compound developed for all the Nucleon protectors 2018.
- Hybrid construction: lattice shell with a new viscoelastic PU foam compound.
- NEW Single injected lattice structure shell constructed with ergonomic design to absorb high impacts and allow maximum breathability and air flow.
- In combination with the NUCLEON PU FOAM on the central spine area extraordinary performance on impact absorption.
- NEW Additional convex design on the central hard shell provides highest protection of the spine.
- Horizontal flex groves for an adaptive fit in all riding positions.
- NEW Adjustable rib protector made by a high performance polymeric material blend for additional side protection.
- NEW Shoulder blade protective padding extensions to protect the acromion bones. Waist adjustment for customized fit and slim vented kidney belt for added position stability and security.
- Adjustable and detachable elastic shoulder straps via snap fit system to allow a more comfortable use of the protector.
- Compatible with the NUCLEON KR-C protector.
- Compatible with the NUCLEON KR-TB protector.
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| Alpinestars Nucleon Back Protector Size Chart |
Write Review
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Back protector
I highly rate this back protector. Wanted the shoulder straps so it would not slip down under my race leathers like my current protector. The middle strap with kidney protection is a real plus and it all fits under my race leathers.
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Nice protection
I got size large due to being 6 foot and a 46 inch chest, fits well. the tail bone pad is long and occasionally gets stuck in my pants, however under 1 piece leathers it isn't an issue. when its cold its rather stiff but once warm under a jacket it becomes flexible and molds to your back.
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Thumbs Up!
I am 5’11”, 201 lbs, (athletic cut in suits) and I purchased the XL. I wear it under my jacket on the street and it is very comfortable as I forget that it is there after the first few minutes.
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Probably the best back protection
Just got the KR3 and I'm super happy with it. Comfortable and way better than my old alpinestars protector. You can't beat this. I'm 5'11" and 180. Bought size L.
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