Originally Posted by
pastorbobnlnh
There is the rare 27T Suntour A sprocket and the Avocet freewheel sprocket to chain ring adapter. If you can find both.
Did Avocet make one too or are you thinking of the Mountain Tamer? I'd love to see the Avocet if anyone has a pic.
They also made one to take two freewheel sprockets to turn your crank into a quad. Not very popular since most F.der.s can't shift 4 chainrings. Somebody (maybe as a joke) set one up as a quint:
Could work well as the captain's crank on a front-drive tandem, with a custom or modified F.der., like Routens and so many other Frenchies did back in the '40s-'50s. Didn't Jan Heine make one recently?