The Alpinestars Nucleon KR-Celli Back Protection Insert, size small, is designed to provide advanced back protection for riders seeking maximum safety and comfort. Crafted with a lightweight construction, this insert features three waist-to-shoulder dimensions that adapt to various body sizes, ensuring a snug and secure fit. The triple segmented back shell plate is made from a high-performance polymer blend that offers an excellent balance of flexibility and weight savings, making it suitable for high-performance riding conditions. Its structural design distributes force efficiently from the center outward, optimizing energy absorption and reducing impact forces during falls or collisions. The unique cell microstructure enhances the back protector’s ability to absorb energy, providing superior protection while maintaining breathability and air-flow for rider comfort. Designed to contour naturally to the back, the ergonomic plate ensures an optimal fit, enhancing mobility and reducing fatigue during rides. Horizontal flexion grooves allow the protector to adapt seamlessly to different riding positions, whether upright or leaning forward, without sacrificing protection. The soft, comfortable AirMesh fabric on the side of the protector maximizes breathability, helping to keep the rider cool and dry even during intense activities. Overall, the Alpinestars Nucleon KR-Celli Back Protection Insert combines innovative materials and thoughtful design to deliver advanced safety features, ergonomic comfort, and breathability for motorcycle riders and sports enthusiasts alike.
Features:
- Lightweight design with three waist-to-shoulder dimensions for versatile fit
- Triple segmented back shell plate made from high-performance polymer blend
- Force-distributing structural design for optimized energy absorption
- Advanced cell microstructure for superior impact absorption and adaptivity
- Ergonomic contouring to match natural back curves for maximum comfort
- Horizontal flexion grooves for flexible movement in various riding positions
- Breathable AirMesh fabric on the body side for enhanced airflow and rider comfort
Alpinestars Nucleon KR-Celli Back Protection Insert – Small (Part 6503919S)
The Alpinestars Nucleon KR-Celli Back Protection Insert, size small, is designed to provide advanced back protection for riders seeking maximum safety and comfort. Crafted with a lightweight construction, this insert features three waist-to-shoulder dimensions that adapt to various body sizes, ensuring a snug and secure fit. The triple segmented back shell plate is made from a high-performance polymer blend that offers an excellent balance of flexibility and weight savings, making it suitable for high-performance riding conditions. Its structural design distributes force efficiently from the center outward, optimizing energy absorption and reducing impact forces during falls or collisions. The unique cell microstructure enhances the back protector’s ability to absorb energy, providing superior protection while maintaining breathability and air-flow for rider comfort. Designed to contour naturally to the back, the ergonomic plate ensures an optimal fit, enhancing mobility and reducing fatigue during rides. Horizontal flexion grooves allow the protector to adapt seamlessly to different riding positions, whether upright or leaning forward, without sacrificing protection. The soft, comfortable AirMesh fabric on the side of the protector maximizes breathability, helping to keep the rider cool and dry even during intense activities. Overall, the Alpinestars Nucleon KR-Celli Back Protection Insert combines innovative materials and thoughtful design to deliver advanced safety features, ergonomic comfort, and breathability for motorcycle riders and sports enthusiasts alike.
Features:
- Lightweight design with three waist-to-shoulder dimensions for versatile fit
- Triple segmented back shell plate made from high-performance polymer blend
- Force-distributing structural design for optimized energy absorption
- Advanced cell microstructure for superior impact absorption and adaptivity
- Ergonomic contouring to match natural back curves for maximum comfort
- Horizontal flexion grooves for flexible movement in various riding positions
- Breathable AirMesh fabric on the body side for enhanced airflow and rider comfort
ATTRIBUTES:
BRAND: ALPINESTARS
MPN: 6503919S








