I have front and rear ultegra 6500 hubs.

I've noticed on this site many people annually servicing their hubs.

I've got about 10k on my hubs over two summers and have not serviced them. I detect no problems with friction, noise, etc... That said I began to wonder if I should dive in and repack the bearings.

My local LBS recommends leaving the hubs alone if there are no problems detected. They feel the hubs are sealed pretty good and servicing them so that they operated as good as new is nearly impossible.

So what is the most prudent course of action - leave them alone or repack them?

Cheers,