7-speed cassette on an 8/9 wheel?
I'm looking for a new wheelset, and am only finding 8/9-speed designs. I'm currently running a 7-speed drivetrain and though I want to upgrade eventually to 9-speed, I'd like to put it off until it's really necessary...
So, the question! Given that my current 7-speed wheelset is 135mm spaced, will I have problems if I buy a set of wheels built for 8/9-speed and try to use it with my existing drivetrain/ cassette?
Thanks!
-chris