Shimano's Positron front freewheel drive train.
that chainring that split to shift .
and the one with a bunch of like little pulleys in slots that expanded as a weight spun
or automatic shifting schemes for bikes in General
BTW it was Zeus pre Christian, so pagan, god of the gods (odd for such a Papist country like Spain)
made some really cool Titanium stuff..
Last edited by fietsbob; 12-18-13 at 05:54 PM.