What's the difference between "uniglide" and "ultra" cogs?
Looking to replace an early 80's regina extra freewheel. Will a Shimano Dura-Ace "uniglide" cog from the late 80's work? I want to use it with a NOS Regina Everest chain and a Campy SR derailleur from the mid 80's.
Also what does "ultra" mean?