This is a 4-1/2″ Brake Drum with a sprocket flange.
Product Specs:
Sprocket Flange has 6 holes on a 5-1/4″ Bolt Circle
2.09″ ID of Center Hole
Works for Hub P/N AZ2561
3 Bolt Hole Patterns:
(3) 5/16″ bolt holes on a 3-3/4″ bolt circle
(4) 1/4″ bolt holes on a 3-3/4″ bolt circle
(4) 9/32″ bolt holes on 3.225″ Bolt Circle
4-1/2″ Brake Drum Option:
Machined 4-1/2″ OD for Brake Band Use
or
Machined 4-1/2″ ID for Internal Expanding Brake Use