I have a knock in my cranks, and need to replace my 30BB, according to my LBS, they are normally good guys, so I'm sure that's the case.

I have a SHIV SWORKS. How long should it last, bike is only 1 year old. I do average 700 Miles a month? How much should I expect to pay? The bike shop said it has to be a ceramic, I have no clue, I just pedal.

Thanks.