1) All around bikes will benefit more from cartidge bearing hubs, with loose ball, even with grease injection you are only lengthening the amount of time between acceptable maitenance, not removing it. Once the races on the hub are gone, say goodbye. Not so with cartridge.
2) They are fine
3) Again, grease injection only lengthens the time between maintanence. It's a shortcut way of delaying the necessary repacking/replacing of bearings. Of course you can repack them like a hub without grease injection ports.
Last edited by operator; 10-26-08 at 07:02 PM.