Last cog in cassette doesn’t fit on freehub
Hey all, I recently got a 9 speed cassette for my bike (HG-900, the 11-32 version). Before I bought I measured the freehub to be about ~35mm long, which from my previous research meant it was compatible with 8/9/10 speed cassettes. I can’t get the last cog in the cassette to seat properly no matter what I do. I don’t think there’s any spacers on my freehub, so I’m not sure why it isn’t fitting. I don’t see any extra spacers in the cassette itself, since gears 1-7 are riveted together.
attached is a video of me putting on the cassette. Sorry it’s kind of shaky and awkward, I’m only using one hand. Thanks for any help, I’ve been trying to put this on for hours now.
EDIT: I think this hub is actually a 7 speed hub after measuring the splines from the base of the hub, it's about 30mm, which isn't as long as the 8/9/10 hub. I wasn't measuring it correctly before.
UPDATE - I have confirmed that my freehub body is indeed 7 speed. Sorry everybody, but thanks for all your comments.