Vortex 641AZB-50 CAT5 Aluminum Rear Sprocket 50-Tooth 520 Black

The Vortex 641AZB-50 is a 50-tooth, 520-pitch CAT5 aluminum rear sprocket finished in an anodized black with contrasting silver machine cuts. Engineered for street and track riders who demand lightweight performance without sacrificing durability, this sprocket is a direct upgrade over heavier OEM steel units.

Key Features:

• Lightweight aluminum construction — reduces rotating mass for improved throttle response and acceleration
• 100% CNC manufactured in the USA to precise tolerances
• Specially formulated alloy per Vortex Racing specifications for optimal strength-to-weight ratio
• Anodized black finish with silver machined highlights for a distinctive appearance and corrosion resistance
• Vortex patented unique tooth design increases sprocket longevity and improves chain engagement
• 520 chain pitch compatible
• 50-tooth rear sprocket for tuned acceleration and low-end torque

The Vortex 641AZB-50 is a trusted choice among racers and performance street riders looking to fine-tune their gear ratios. Paired with a quality 520-pitch chain, this sprocket delivers consistent, reliable power transfer lap after lap.