Originally Posted by
The Golden Boy
Was I incorrect about what I posted?
Basicaly I stated that:
as far as spacing Shimano 6s = Shimano 7s = Accushift 6s.
Accushift 7s is spaced differently.
You can use 6 out of 7 of the Shimano cogs.
If any of that is wrong- I'll edit my post(s).
Did you actually mean to say that Shimano 6-speed spacing (3.6mm spacers) is the same as Shimano 7-speed spacing (3.1mm spacers, with one 3.3mm spacer between 2nd and 3rd smallest cogs)???
I did respace one just the other day, and my SIS-6 cassette spacers each measured all of 3.65mm.
And yes, Accushift 7s is spaced differently, primarily the largest 3 cogs are noticeably closer together, and as confirmed in Suntour's freewheel charts.
And yes, Shimano 6s spacing is definitely functionally equivalent to Suntour's Accu-6 spacing, and seem to be equivalent to standard older 5 and 6-speed spacing as well.
Suntour Accu-7 spacing seems the same (at the large end) as an Ultra-6 freewheel, and similar to the earlier Suntour 7s, what I think was called New Winner Ultra-7.