Upgrading Joytech hub from 8 speed to 10 speed I have a Joytech hub and I'm planning to upgrade from 8 to 10 speed. With my Joytech rear hub, do I need to change my hub first and does my hub support 10 cogs?
Provided the hub has a Shimano/SRAM compatible cassette body you should be able to upgrade to 10 speed with your existing hub.  Campagnolo 8 speed cassette bodies are incompatible with Campy 10 speed cassettes so if you are running Campy you will need a new hub.