This is a 4″ Brake Drum with 72 Tooth Steel Sprocket #35 Chain. The combination of the drum and steel sprocket provides a reliable unit at an economical price. This sprocket was used on many vintage minibike setups.
Product Specs:
Drum has a 4-1/8″ ID & 4-3/8″ OD
(3) 5/16″ Bolt Holes on a 3-1/4″ bolt hole circle
Center bore: 1-5/8″
Sprocket: 72 Tooth
Chain: #35
Available option:
Add a 4″ Internal Expandable Brake
(5/8″ Bore & 4-1/8″ OD)