Or you can get a 10 speed cassette and just swap out the spacers for 9 speed ones and it could work, unless the largest cogs are rivetted together in which case you're stuffed. I'm not familiar with DA stuff but I've done that with Campag 8 and 9 speed and it's not been a problem.
Or you can get a 10 speed cassette and just swap out the spacers for 9 speed ones and it could work, unless the largest cogs are rivetted together in which case you're stuffed. I'm not familiar with DA stuff but I've done that with Campag 8 and 9 speed and it's not been a problem.