OK, I'll bite ()
It's a fair question: Huret pulleys were toothless, (they also used loads of tiny ball bearings)...but everybody else, including the aftermarket pulleys, all have teeth.
So was Huret the only mfg. that got it right?
Has anybody tried running their Campy, Shimano, Suntour, Sram, etc. RDs with the pulleys ground smooth...and what happened?