Originally Posted by
cudak888
That's one thing I do NOT recommend - using 9 or 10 speed chains on 7-speed "stamped-cog" (non-ramped, to be exact - Regina and Suntour, for instance) freewheels - or any 7-speed freewheel. Too many chances for chain skate.
-Kurt
Are you sure the old Regina cogs were stamped? There's a groove down the middle of the teeth on all their cogs except the smallest one in any freewheel. you can't stamp that into a cog. That and there's evidence of milling or machining on all the NOS Regina cogs i have here and I have a lot of them.