Originally Posted by
frankenmike
Doesn't the smallest cog have to stay on the outside edge? All my cassettes have a lipped small cog.
OP: PVC pipe?
The smallest cog does stay on the outside of all of the other cogs but it doesn't have to be right up against the lockring. The 4.5 mm spacer can be installed outside of the the smallest cog and the lockring can tighten down against it. The lockring, if torqued to spec, will remain tight with no problems.