Originally Posted by
HillRider
That is correct. Also the spacer is usually installed on the hub before the cassette but some cassettes are bolted together and the bolt heads interfere with the spacer so the cassette won't seat all the way.
There are two approaches to fix this:
1. Remove the bolts and install the cassette as all loose cogs and spacers.
2. Install the cassette on the hub first and install the spacer after the smallest cog and under the lockring.
Either way works.
I solved this problem a third way when I used to run 7 speed on a White Industries 8 speed hub with a Hyperglide-C cassette:
I marked and drilled 3 half-depth "reliefs" in the aluminum spacer to clear the bolts, or rivets, or whatever they were. Worked great.