---
product_id: 142509289
title: "Nucleon Kr-Celli Back Protection Insert"
brand: "alpinestars"
price: "AR$256179"
currency: ARS
in_stock: true
reviews_count: 13
category: "Alpinestars"
url: https://www.desertcart.com.ar/products/142509289-nucleon-kr-celli-back-protection-insert
store_origin: AR
region: Argentina
---

# Ultra-lightweight polymeric honeycomb design Strategic ventilation channels for airflow CE Level 1 certified impact absorption Nucleon Kr-Celli Back Protection Insert

**Brand:** alpinestars
**Price:** AR$256179
**Availability:** ✅ In Stock

## Summary

> 🛡️ Ride protected, ride light, ride smart — gear up like a pro!

## Quick Answers

- **What is this?** Nucleon Kr-Celli Back Protection Insert by alpinestars
- **How much does it cost?** AR$256179 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/142509289-nucleon-kr-celli-back-protection-insert)

## Best For

- alpinestars enthusiasts

## Why This Product

- Trusted alpinestars brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Breathe Easy:** Innovative ventilation channels keep you cool when the ride heats up.
- • **Ergonomic Fit:** Triple-segmented, flexible design adapts seamlessly to your back’s natural curve.
- • **Next-Level Safety:** CE Level 1 certification guarantees top-tier impact protection for fearless rides.
- • **Featherweight Armor:** Crafted from advanced polymer honeycomb, it’s so light you’ll forget it’s there.
- • **Seamless Integration:** Compatible with select Alpinestars jackets and suits for effortless upgrade.

## Overview

The Alpinestars Nucleon KR-CELLi Back Protection Insert is a CE Level 1 certified, ultra-lightweight polymeric back protector featuring a honeycomb micro-structure for superior shock absorption and airflow. Its ergonomic, triple-segmented design flexes with your body, ensuring all-day comfort and optimal fit. Designed for seamless integration with select Alpinestars gear, it’s the ultimate upgrade for riders demanding premium protection without compromise.

## Description

Alpinestars Nucleon KR-CELLi back protector. The extremely lightweight KR-CELLi protective insert features an articulated back plate for flexibility and fit, as well as an advanced cell micro-structure design for effective shock absorption and high air flow. Features: Back protector. The ultra-lightweight Nucleon KR-CELLi protective insert is designed in three dimensions from waist to shoulder to fit all statures. The triple segmentation back protector is made of a blend of high-performance polymer materials for optimal flexibility and excellent weight reduction. The structure of the back protector and the change of structure from the middle to the outside ensure the perfect balance between force distribution and energy absorption. Unique cellular micro-structure for optimal energy absorption, adaptability, breathability and airflow. The ergonomic protective plate adapts to the natural curvature of the back and ensures an optimal fit while driving. Horizontal flex grooves for adaptive adjustment in different riding positions. The pleasantly soft Airmesh fabric on the body side of the protector provides optimal breathability and riding comfort. Protection level: Level 1 (EN1621-2:2014) Size: S Height: 144 - 167 cm. Waist:68-76cm/26.8-29.9" Waist to shoulder: 38 - 43 cm. M Height: 164 - 183 cm. Waist: 76 - 88 cm. Waist to shoulder: 43 - 48 cm. L Height: 180 - 195 cm. Waist: 88 - 111 cm. Waist to shoulder: 48-51 cm. 60% polyurethane, 38% polyester, 2% others.

Review: Thoughts on use - Been using this for a while now. I shift it between my jacket and my vest and it fits well. It's light and flexible and doesn't interfere with movement. It's cool and comfortable when riding.
Review: Back in Black - Wow, this back protector is a game-changer! Its triple-segmented back shell, made from a high-performance polymeric material blend, offers flexibility and lightweight comfort. The single-injected lattice structure ensures advanced energy absorption, adaptability, and maximum breathability. Plus, it's ultra-lightweight and comes in three waist-to-shoulder dimensions to cover all body sizes. I felt like a superhero gearing up for a ride, half-expecting to repel bullets (not recommended to test this theory). However, the ergonomic back protector plate conforms to the natural curve of the back, ensuring an optimal fit while riding. Overall, this back protector is a stellar investment for any rider seeking top-notch protection without sacrificing comfort.

## Features

- Lightweight
- Imported
- Advanced back protection with CE Level 1 certification ensures reliable impact absorption and rider safety on every ride.
- Constructed from lightweight polymeric material with a honeycomb design for optimized airflow and reduced weight.
- Ergonomic, flexible structure adapts to rider movement, providing all-day comfort without restricting mobility.
- Strategic ventilation channels promote constant air circulation, keeping riders cool during demanding conditions.
- Compatible with select Alpinestars jackets and suits, offering easy integration and versatile protection upgrade.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07FRJXMKS |
| Age Range (Description) | Adult |
| Best Sellers Rank | #114,584 in Automotive ( See Top 100 in Automotive ) #2,459 in Hand & Arm Protection #10,056 in Motorcycle & Powersports |
| Brand Name | Alpinestars |
| Closure Type | Pull-On |
| Customer Reviews | 4.8 4.8 out of 5 stars (797) |
| Date First Available | August 21, 2018 |
| Included Components | no |
| Item Dimensions LxWxH | 7.87 x 7.87 x 7.87 inches |
| Item Package Dimensions L x W x H | 21 x 10.75 x 0.5 inches |
| Item dimensions L x W x H | 7.87 x 7.87 x 7.87 inches |
| Manufacturer | Alpinestars |
| Model Name | 6503919-L |
| Number of Items | 1 |
| Package Weight | 0.48 Kilograms |
| Part Number | 1696280103 |
| Size | Large |
| Strap Type | Adjustable |
| Style | Motorcycle |
| Suggested Users | unisex-adult |
| Warranty Description | 2 Year Manufacturer |

## Product Details

- **Brand:** Alpinestars
- **Color:** Transparent Smoke
- **Item Weight:** 0.3 Kilograms
- **Material:** high performance polymeric material blend
- **Sport:** Motorcycling

## Images

![Nucleon Kr-Celli Back Protection Insert - Image 1](https://m.media-amazon.com/images/I/71cnL-uR3wL.jpg)

## Questions & Answers

**Q: my current back pad is 15.25" x 11.5".  what size do i order?**
A: I have the same dimension and large is way too big to fit in the back slot.  Vertically, this item in a Large is 17 inches

**Q: What size should i buy for an alpinestars faster airflow leather jacket size 50 (euro size)?**
A: Buy Large. 
👍🏻

**Q: I did not find its size, can you tell me the size of the large, medium and small? I don't know how to choose**
A: Size	        Height	Width
Small	15	        8.75
Medium	16.75	9.5
Large	17.75	10

**Q: why dont they list the size (dimensions) instead of the package size?   Seriously??**
A: Probably  Because it comes in a small plastic bag that fits it really tight

## Customer Reviews

### ⭐⭐⭐⭐⭐ Thoughts on use
*by R***H on August 11, 2025*

Been using this for a while now. I shift it between my jacket and my vest and it fits well. It's light and flexible and doesn't interfere with movement. It's cool and comfortable when riding.

### ⭐⭐⭐⭐⭐ Back in Black
*by D***R on March 16, 2025*

Wow, this back protector is a game-changer! Its triple-segmented back shell, made from a high-performance polymeric material blend, offers flexibility and lightweight comfort. The single-injected lattice structure ensures advanced energy absorption, adaptability, and maximum breathability. Plus, it's ultra-lightweight and comes in three waist-to-shoulder dimensions to cover all body sizes. I felt like a superhero gearing up for a ride, half-expecting to repel bullets (not recommended to test this theory). However, the ergonomic back protector plate conforms to the natural curve of the back, ensuring an optimal fit while riding. Overall, this back protector is a stellar investment for any rider seeking top-notch protection without sacrificing comfort.

### ⭐⭐⭐⭐⭐ Nice protector
*by K***J on October 9, 2025*

Fits my Alpinestars armored hoodie perfectly, as it should!

## Frequently Bought Together

- Alpinestars Adult Motorcycling Back Protector, Black
- Quad Lock Motorcycle Vibration Dampener for Smartphones
- Alpinestars SMX-1 Air V2 Gloves, Short Cuff Fit, Leather and Mesh Construction, CE-Certified, Ergonomic Protection, Summer Riding Glove, L, Black/Yellow Fluorescent

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**Shop now:** [https://www.desertcart.com.ar/products/142509289-nucleon-kr-celli-back-protection-insert](https://www.desertcart.com.ar/products/142509289-nucleon-kr-celli-back-protection-insert)

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-03-02*