Name: Alpinestars Nucleon Kr-1 Cell Back Protector
Brand: Alpinestars
SKU: 2702-0249
Price: 219.95 USD
Availability: InStock

Alpinestars Nucleon Kr-1 Cell Back Protector - Motor Psycho Sport

$ 219.95

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We are an Authorized Dealer for all the Brands that we sell. Below are the links to our distributors who authorize us to carry what we sell.

Helmet House is our distributor for...

SHOEI - HJC - ALPINESTARS - CORTECH - TOURMASTER - SENA - SIDI

https://helmethouse.com/dealers/4955008-motor-psycho-sport.html

Parts Unlimited - Drag Specialties - LeMans Corp is our distributor for...

ARAI - ALPINESTARS - THOR - ICON - MOOSE RACING - Z1R - SENA - DUNLOP - METZELER - FMF - MOTUL - MAXIMA - RENTHAL - YOSHIMURA - TWIN AIR - ODI - 100% - SPECIALIZED - CRANKBROTHERS - MICHELIN - AGV - FACTORY EFFEX - AFX - AND MORE!

https://www.parts-unlimited.com/find-dealer (Type in 91320 for our zip code)

Parts Unlimited is the largest powersports distributor in the United States. They are now the exclusive distributor for Arai Helmets in the U.S.. Their house brands are Icon, Moose, Thor, AMS, Z1R, Arctiva and more.

WPS - Western Power Sports is our distributor for...

ALPINESTARS MX - GAERNE - FLY RACING - ODI - FMF - SCORPION - MIKA METALS - HIGHWAY 21

https://www.wps-inc.com/dealer-locator?distance=25&location=91320

Western Power Sports or WPS is the faster growing distributor currently. Their house brands are Fly Racing and Highway 21.

Turn14 Distribution is our distributor for...

ANSWER - MSR - PRO TAPER - FMF - GAERNE - ACERBIS - ATHENA - DRAGONFIRE - CYCRA - EVS - FIRSTGEAR - SPEED & STRENGTH - GIANT LOOP - RIVER ROAD - USWE - VANCE AND HINES - WISECO

https://www.turn14.com/about

Turn14's house brands are Answer, MSR, Pro Taper, Renthal, Vance & Hines, Firstgear, and Speed & Strength.

O'NEAL & OGIO POWERSPORTS is our distributor for...

O'Neal - OGIO

O'neal doesn't have a dealer locator but we buy direct from O'Neal and also use them for OGIO Powersports as they are the U.S. distributor for OGIO POWERSPORTS. OGIO is owned by Callaway Golf.

Bell Helmets Dealer Locator

https://troyleedesigns.com/pages/store-locator (Type in 91320 Zip Code)

Features

Cell Technology back protector is constructed from a high-performance polymeric material blend for optimized flexibility and excellent weight saving properties
Developed in three waist-to-shoulder dimensions in order to cover all body sizes
Extended lower back protector offers more protection to the rider
Highly-perforated for maximum breathability and ventilation
Horizontal flexion grooves for an adaptive fit in different riding positions
Adjustable and detachable elastic shoulder straps via a snap fit system for greater comfort
Height adjustable kidney belt featuring dual hook-and-loop closure system for easy, secure closure
Soft Bio-Foam passed chassis for maximum comfort

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Let customers speak for us

from 748 reviews

Great Products, Excellent Customer Service!

I can't recommend Motor Psycho Sports enough! We ordered a helmet as a gift for our son. It arrived in perfect condition in a few days. It was too large, so we needed an exchange. The owner of the company corresponded directly with me via text, and arranged the exchange so our son had his new helmet within a short time. There was no shipping costs for the exchange, and the new helmet fit perfectly. We were happy to work with a small American company with such good customer service and competitive prices, and would definitely make a purchase here again.

Nicklas

01/21/2026

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Awsome service really appreciate your company I will be buying again from you thanks

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01/19/2026

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Gaerne boots vs Fed Ex

Excellent service and customer concern reply. Website needs to disclose shipping options to avoid confusion and proper addressing of shipments. In rural areas Fed Ex drivers are contract drivers so you never get the same one twice. They tend to mis-deliver or take extra time trying to figure out recipient location. Conversely all UPS drivers are route assigned/bid drivers and have thorough area knowledge. Thanks again!

Terry

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Look fantastic

Haven't tried them yet unfortunately weather is not on my side here in the northeast. Looks fantastic great communicate great service

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01/17/2026

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Great price and fast shipping!

Shane

01/13/2026

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Happy feet

The boots are stiff out of the box, but put them on and wear them around the house a bit, and you are good to go. Good protection for the feet. Quality build. And Motor Psycho Sport are a great company to buy from.

David

01/10/2026