After hitting up the Dragon today at the Rotary Rally at Deals Gap, I heard a familiar sound coming from the back wheels. I know its a wheel bearing issue but my question is, should BOTH the rear bearings be replaced, or is it O.K to just replace the one that is bad?

 

you can do one at a time, its actually really common that only one is bad.

since they need to be pressed out though, think about if its easier to just pull the rear apart once and do both.