Bearing life

[Fisher]

Is there a general rule on when to get your bearings replaced? I have made alot of trips up to Canada from Oklahoma with my boat. I always keep them lubed and never have had a problem, but at what point do you say, better just replace these before they go bad? Or is it a, if it ain't broke type of a deal?

Thanks,

[CatFan]

If they stay dry, and properly greased and tightened, they'll last as long or longer than the bearings on your car.