knackered bearings?

frankspencer1979 Posts: 525
edited January 2012 in MTB beginners
Over the past couple of days I've noticed a slight rattling noise as I spin the rear wheel. I know a diagnosis is pretty tricky just from that description, but is it likely to be a knackered rear hub due to aggressive jet washing!? :|

There's no play in the rear wheel at the moment, but is that what'll happen and is a replacement hub with less jet washing the answer!?