Originally Posted by
squarenoise
And to reiterate, you only need to use 8 speed spacers on the last 3 (low gears) of the Shimano cassette, since Suntour indexing has split spacing of 3 x 3.0 mm(H) and 3 x 2.8 mm(L).
And don't assume the same thing for Ultra 7 freewheels, which are evenly spaced. Now, about those Campy cassettes...