Vortex 641AZK-48 Aluminum Rear Sprocket 48-Tooth Black Anodized

The Vortex 641AZK-48 is a 48-tooth aluminum rear sprocket finished in a black anodized coating. Designed for the serious street and track rider, this sprocket delivers a performance-focused alternative to heavy OEM steel units, helping reduce rotating mass for improved throttle response and drivetrain efficiency.

Key Features:

• 48-Tooth rear sprocket — adds low-end torque and acceleration compared to lower tooth-count sprockets
• Lightweight aluminum construction — reduces rotating mass for improved power transfer
• 100% CNC manufactured in the USA — precision machined to exacting tolerances
• Specially formulated aluminum alloy per Vortex Racing specifications for optimal strength-to-weight ratio
• Black anodized finish — corrosion-resistant with an aggressive, race-ready appearance
• Unique Vortex tooth profile — patented design engineered to increase sprocket longevity and chain engagement

The 641AZK series sprocket is engineered to work with the corresponding chain pitch for the specific fitment application. Always confirm chain pitch compatibility when upgrading sprocket tooth count. This sprocket is a direct bolt-on replacement designed for proper OEM hub fitment in the 641 series mounting pattern.