Cassette Compatibility CS-HG50-9
So I searched everywhere for cassette compatibility, maybe yall can help me. I believe to have a 8/9/10 hub on a velocity dyad from Rocky mountain which I have installed a 10 speed 105 cassette with no problems for the past couple of months. I decided to drop down to a 9 speed cassette and bought a CS-HG50-9. I've tried to install and realized the the final 12T cog doesn't go all the way down, the of the spline is beveled so therefore the final cog can't secure on.
I'm thinking it has something to do with compact cassettes and I might have an older cassette?