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Alpinestars Nucleon KR-Ci Chest Protector Insert - Mens

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in Body Armour

Nucleon chest protector insert for Alpinestars clothing

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Was $32.60

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Customer Reviews for Alpinestars Nucleon KR-Ci Chest Protector Insert - Mens

Alpinestars Nucleon KR-Ci Chest Protector Insert - Mens
September 24, 2020

Alpinestars Nucleon KR-Ci Chest Protector Insert -

Very light, nice and flexible , when fitted into my Alpinestars jackets you cannot even feel them, the protectors fit my jackets pockets nice and tight so no movement great fit great item, the chest protectors are as I say nicely made, nice and light very flexible, no sharp or hard edges, great product Hopefully I'll never have to write about how good there protective quality, but I think if needed it will be first rate

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Alpinestars Nucleon KR-Ci Chest Protector Insert - Mens
May 11, 2020

Safety front!

After suffering a chest injury, did the usual thing of bolting the door after the event! Great bit of kit, nice and thin so no tightness in the jacket. Tricky to fit, for me, but that's the jacket design (Alpine stars Motegi). Good buy would recommend. Usual super service from SBS.

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Alpinestars Nucleon KR-Ci Chest Protector Insert - Mens
May 6, 2020

Perfect fit

Well made, perfectly fits in my Alpinestar T-missile jacket.

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Alpinestars Nucleon KR-Ci Chest Protector Insert - Mens
May 4, 2020


It took a little bit to bit delivered but understandable under the current circumstances. Perfect packaging, great quality items

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Alpinestars Nucleon KR-Ci Chest Protector Insert - Mens
April 27, 2020


I just bought a pair of these bad boys in addition to my Alpinestars Andes II textile jacket. Fits the armor pocket perfectly and doesn't boter you in any way while riding, yet provides great protection to the chest. A must have for each compatible Alpinestars jacket.

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Alpinestars Nucleon KR-Ci Chest Protector Insert - Mens
April 23, 2020

CE Chest Protector for Alpinestars

well made, light weight, slim line and flexible and hence non obtrusive, CE approved. The Alpinestars jacket is well designed and tailored to fit these protectors without necessarily going up a size to fit, however as I fitted both back and chest protectors I did go up a size on the jacket

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Alpinestars Nucleon KR-Ci Chest Protector Insert - Mens
April 12, 2020

Hope these are never used!

I was surprised at how firm these protectors were. Having not ridden for long I didn't know what to expect!. I have an alpinestars jacket and the protectors slotted in fine! I would certainly recommend them for anyone that wants that extra piece of mind!

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Alpinestars Nucleon KR-Ci Chest Protector Insert - Mens
February 1, 2020

Treat yourself to added safety

The product is presented well in a usuable mesh bag (think mesh bag for laundry). The protectors replace the probable comfort foam pads that are already in your jacket. They're the same shape but much thicker. So my advice is if your jacket is on its absolute limits in terms of fitting you, this may make the jacket to tight. The protectors are quite stiff foam when cold, stiff enough that you'll notice them. They become more flexible as they warm up to your body temperature, when this happens you'll notice them less. I don't know what they're like when it's summer because temps haven't got past 10c since I've started using them. I can't comment on effectiveness in a crash since that hasn't happened for me yet, I use my bike for commuting so I think the most likely crash is going to be me being launched into my bars/onto/over a bonnet and my chest is probably going to take a hit so that's why I've opted for these. I'd recommend them though, they don't impact your comfort much, they make you feel a bit more secure. Any added protection is nearly always going to be a benefit. For the price as well, to potentially lessen upper chest injuries, do yourself a favour and get them.

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Alpinestars Nucleon KR-Ci Chest Protector Insert - Mens
January 24, 2020


Excellent protection for the chesticles incase of any spills

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Alpinestars Nucleon KR-Ci Chest Protector Insert - Mens
January 14, 2020

Perfect fit.

These chest protectors are a perfect fit in my Alpinestars textile jacket. They are completely unobtrusive and compliment the Alpinestars back protector. You cannot tell they're in place when riding as they are so comfortable. They give me more piece of mind too - but I hope I never have to put them to the test. I will be ordering the thigh protectors too. Great service from Sportsbikeshop as always. :)

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Alpinestars Nucleon KR-Ci Chest Protector Insert - Mens

  • Impact and vibration protection upgrade
  • Optimized to fit compatible Alpinestars jackets
  • Super slimline profile
  • Perforated for improved breathability


Alpinestars, a truly world class brand of motorcycle apparel. Founded in the early 1960s by Sante Mazzarolo, Alpinestars has grown to be a world leading manufacturer of professional racing products such as leather jackets, jeans, boots and 1 piece suits. Whilst their leathers are worn by some of the biggest names in bike racing, they also specialise in high performance textile jackets, jeans and gloves. From F1 to Karting, the World Rally Championship to NASCAR, Alpinestars work with the very best drivers and riders to bring design innovations to all aspects of professional motor-sport.

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Questions and Answers

Questions and Answers

  • Will these inserts fit into a Motegi leather jacket?

    June 19, 2018

    Yes, I can confirm these do fit the jacket.

  • will these fit in gp plus r leather jacket thanks

    May 28, 2018

    Yes, this will fit.

  • Are these inserts CE level 1 or 2?

    March 22, 2018

    These inserts are certified to prEN 1621-3:2013 and are not regarded as level 1 or 2.

  • How do you fit these chest protectors to the Managua jacket? Cant find my way into the pockets for the inserts.

    November 13, 2017

    Access is through the zip at the bottom of the jacket - hook and loop fasteners hold the chest inserts in place directly behind the inside pockets.

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