i just replaced mine all the way around. But i used ALL BALLS brand. (Liked the name...) Well ive had them in there a while and they are working fine of course. As long as they arent stock u should be ok. I didnt put a grease zerk in mine b/c the only thing that will great is the spacer up against the carrier, which the spacer fits so loosely in there it doesent really touch. MEADOWS. <<<CWB>>> [/color]