M&W 6.438 Aluminum Rear Sprocket 50T-Micro/Mini Sprint-6 Lug Hubs

Sprockets are made from lightweight 7075-T6 aluminum Designed for used on a 520 tooth chain Several tooth sized to choose from to custom fit your application Inside diameter measures 6" and is 1/4" Designed to fit 6-lug hubs with the 6.438" bolt circle