Do 8 speed cassettes fit on 7 speed freehubs?

gt-arrowhead

Just spotted an awesome deal for an 8 speed cassette and a chain, and my current bike has as a quite badly worn 7 speed cassette on the back.

Im planning to take a used 8 speed casssette off my main wheelset, put them on the 7 speed freehub on my 2nd wheelset, then get a new cassette for my main wheelset.

I was wondering if it would be possible to get an 8 speed cassette onto a 7 speed freehub?

njee20

Not if it's truly a 7 speed freehub no. If if has a spacer behind it then yes.

gt-arrowhead

Its a 7 speed freehub, so no spacers.

Thanks for the reply.

The Rookie

If it's a cassette you can dismantle, you can use 7 of the 8, or you can use 8 off a 9 (using a 9 speed shifter) as well.