Thanks for the replies,

One of the other reasons was that maybe I could go with some different gearing at the same time. I'm here in Fl with mostly paved/MUP riding 85%/15% hard pack trails. I don't know how much difference I can make with just the cassette but maybe some chain ring changes up front too? I'm currently at 11-32D 9 speed in the rear and 48/36/26 up front. I'd like a little more speed for the pavement.