Originally Posted by
fietsbob
getting #9 in a space for 8, thins out the gap between cogs.
Hyperglide tooth profiles are eager to shift early.
Even wide spaced 6 speeds are willing to jump,
with the side of the cog shift ramps lifting the chain quite readily.
I liked older freewheel tooth profile for friction shifting ,
because the chain stayed put, until moved off with a slight overshift
and pull back to re center the pulley over the cog.
but the designers dropped that .
I'm using the IG hub drivetrain bikes most these days..
They dropped that because it won't work with indexed shifting. Index derailers must shift early. I detest Campy NR/SR because of that late shifting and readjustment after every shift, but some oldtimers like it because they're used to it. I'm an oldtimer, but I never got used to it. I find it especially annoying with Barcons.