Free Flow Chains possess dimensional restraints and so require unique sprockets.
Tsubaki provides sprockets for Dual In addition Chains, sprockets for Dual In addition Chains with top rollers, and sprockets for RS Chain with outboard rollers.
Product Lineup
Product Types / Features
Sprockets for Dual Plus Chain/Center Roller Chain
Sprockets for Double Plus Chain/Middle Roller Chain. May be used with Double Plus Chain with snap sprockets covers.
Details
Sprockets for Dual In addition Chain with Outboard Rollers
Use 
Sprockets for Double Plus Chain.
Details
Sprockets for RS Chain with Outboard Rollers
Outboard rollers upon RS Chain with outboard rollers might interfere with sprocket hubs depending on the amount of sprocket teeth. Use this special sprocket instead.
Details
Sprockets for Dual Plus Chain with Best Rollers
R Rollers on Double In addition Chain with Top Rollers could cause interference with regular sprocket teeth. Utilize this special sprocket instead.
Details
Sprockets for RS Chain with Best Rollers
Use Drive Sprockets.
Details