Wheel bearings - tell tale signs
So I've been on my current powertap wheels (stans alpha ztr 340's) for just over a year now, they've done about 10-12k miles. I've read a few times that the powertap hubs (especially the older ones) do need a good service quite regularly. However, they seem healthy enough, there's no rocking and no untoward sounds but I'm imagining at some point this season they're gonna want a service.
What I'd like to know is what usual tell tale signs are there for when your hub bearings want sorting? Or any best practices to follow?