RFX Pro Series Armalite Double Compound (Steel/Aluminium) - 520 SprocketRef : RFX01137A / 1123218007

RFX Pro Series Armalite Sprocket – reference FXRS10-50ALBK

Designed for motocross and enduro competition, this 520 dual-ring composite sprocket combines a machined 7075-T6 aluminum center and a high-density carbon HCS outer ring. The result is a compromise between lightweight and tooth longevity, with optimized stiffness to transmit power without stressing the rivets thanks to the revolutionary hexagonal interface.

• Type: Dual composite 520 sprocket
• Material: CNC aluminum 7075 / HCS outer ring
• Teeth: 50 teeth
• Finish: Black anodization
• Design: Lightweight CAD profile, mud evacuation grooves

The Armalite design limits unsprung weight while increasing torsional strength: useful for aggressive trajectories and repeated jumps. The new grooves facilitate dirt clearance and help reduce wear in muddy conditions. The Hex-Drive interface ensures a direct mechanical connection between the two rings, maximizing power transmission.

Compatibility: suitable for 520 sprockets and the listed RFX motocross/enduro models, including several variants of Honda CRF 450 (2026). Installation: follow the hub disassembly/reassembly steps, use thread locker (blue Loctite) on fasteners, and adhere to the torque specifications recommended by the manufacturer.