Free Flow Chains have dimensional restraints and so require special sprockets.
Tsubaki provides chain sprocket sprockets for Dual In addition Chains, sprockets for Double Plus Chains with best rollers, and sprockets for RS Chain with outboard rollers.
Product Lineup
Product Types / Features
Sprockets for Dual Plus Chain/Middle Roller Chain
Sprockets for Double Plus Chain/Center Roller Chain. May be used with Double Plus Chain with snap covers.
Details

Sprockets for Dual Plus Chain with Outboard Rollers
Use Sprockets for Dual Plus Chain.
Details
Sprockets for RS Chain with Outboard Rollers
Outboard rollers on RS Chain with outboard rollers may interfere with sprocket hubs depending on the amount of sprocket teeth. Utilize this special sprocket rather.
Details
Sprockets for Double In addition Chain with Best Rollers
R Rollers on Dual Plus Chain with Top Rollers could cause interference with standard sprocket teeth. Utilize this special sprocket rather.
Details
Sprockets for RS Chain with Top Rollers
Make use of Drive Sprockets.
Details