USD / United States
Alpinestars Nucleon KR-2I Back Insert - Black
CE approved Level 2 back insert for Alpinestars jackets and suits
View full details
Our price
Customer Reviews for Alpinestars Nucleon KR-2I Back Insert - Black
Great protection
Perfect fit for my alpinestar jacket. Lightweight and very flexible
Read moreGood safety enhancement to jacket
Good level 2 back insert specific to Alpinestars jacket. It was for my wife's jacket which they don't supply with a back insert, but the pocket is there. Tried one from an old jacket but didn't fit. Glad the sportsbikeshop website gives details of which size you need depending on jacket size. Quality product, Wife says it is very comfy.
Read moreLove it
I don't even notice it's there. Super light and flexible yet nice and thick. Worth the bit of extra money and a perfect fit for my A-star jacket too. Medium pad in a Euro 52/US 42 jacket
Read moreAwesome bit of kit
Service from SBS is awesome great service and speed, this item turned up and it looks big and heavy but is not the case at all. I got this to go into my Alpinestars Valparaiso 2 Drystar Textile Jacket it fitted right in. The first ride was in 26C temp and my old back cover made me hot and have a wetback. This nothing with the front vents open on the jacket I can feel the wind go in and out thru the back protector. I now feel safe if the worse should happen as this item means business in saving me pain and some discomfort if the worse happens 5 star item
Read moreConfidence when riding
Recently bought a GP Plus R V2 jacket and I am a 46 chest, so the large size fits perfect and that's what you will need. It feels great and makes me feel I have given myself a stronger chance to limit injury if the worse happens. Given the price of these jackets I would expect them to be included in the price. Great service from SBS again
Read moreCertainly looks / feels the part
M fits my M textile jacket nicely and certainly looks / feels like it will do the job. Why doesn't this come with a jacket as standard I wonder / would pay the extra up front for it.
Read moreSpot on
This back protector is a perfect fit my my alpinestars jacket and is lightweight and comfortable.
Read moreExcellent service as usual
The way in which the sales system is set up at Sportsbike shop, the attitude of staff, the range of products, stockholding, delivery and communication is second to none! And no, I don't work for them. Once again, thank you.
Read moreSolid fit in the jacket
Feels robust and comfortable. Fits nicely into the jacket with no loss of comfort. Top buy.
Read moreComfortable and Sturdy
Fitted it into an Alpinestars T-Missile Drystar jacket. Comfortable and feels very secure. Great bit of kit. Highly recommend.
Read moreAlpinestars Nucleon KR-2I Back Insert - Black
| Option | Maximum height | Maximum width |
|---|---|---|
| Small | 38.5cm | 22.5cm |
| Medium | 42.0cm | 24.5cm |
| Large | 44.5cm | 26.5cm |
The latest in back protection inserts from Alpinestars is the Nucleon KR-2i soft back protector insert. Suitable for all Alpinestars jackets or suits that feature a back protector pocket. It's design conforms to the latest back protector standards with it's Level 2 CE-certification (EN1621-:2014). The 'Nucleon' back protector's design has been ergonomically profiled for an optimised fit, whilst the lightweight design and flexibility with incorporated airflow system helps to keep the wearer both cool and comfortable. This highly protective back protector is quick and convenient to insert and offers the perfect fit for the ultimate in safety performance.
Back protector compatibility chart
- Level 2 CE approved
- Lightweight, Flexible Design
- PU Injected Impact Foam
- Ergonomically Designed Profile
- Perforated For Breathability & Comfort
- Channel Ventilation System For Optimised Airflow
About
Alpinestars
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.
See all Alpinestars products…Questions and Answers
I have just received an Alpinestar Ares goretex jacket 2xl what back proctor will fit this jacket? Many thanks.
December 13, 2018A 2XL jacket requires the large Nucleon back protector.
Hi I have purchased an Alpinestar Jaws Leather Jacket off yourselves recently- size 42 chest. I'm 6ft 3" and slim. Jacket is snug but good fit. Which size would you recommend re. the back protector?
September 6, 2018We would recommend the medium back protector.
Hi, looking at purchasing the Alpinestar GP plus R v2 size 46 U.K. Q1 is this the best back protector? Q2 what size for the 46?
April 25, 2018This is the Level 2 CE approved back insert that Alpinestars recommend. If you were to purchase an Alpinestars Jacket in a UK size 46, you require the Large insert.
I have an Alpinestars Motegi Leather Jacket size EU56. Which size do I need as the compatibility chart isnt clear if they are using the Euro or product size?
August 14, 2017You will need a size large for your jacket
I have an Atem one Piece suit 3 years old.It has no pocket for a back protector just the press stud fixings. How is the Nucleon held in place as there are no reciprocal stud fittings shown on the photos of the protector ?
January 26, 2017This product is only suitable for all Alpinestars jackets or suits that feature a back protector pocket.
