[QUOTE=buttbybrooks]
Originally Posted by If it's damaged, you have to pull and replace the bearing. Not that big a deal, any good special-tool place in town should have one for $10-15. Get grade-0 or 00 and it should last 50 years. :)[/QUOTE
Thanks for the help. If I do need a specialty tool to repair a damaged bearing what should I ask for? Would it be found in a hardware or automotive specialty store or only a bike shop.
How old are these hubs? If they are realtively new, they might be field servicable hubs. Take the wheel off the bike and look to see if a 5mm allen wrench will fit in the axle end. If it does you can take the hub apart by unscrewing one side of the axle (you need 2 wrenches). The whole thing will come apart then.
If they aren't field serviceable, you'll need something to drive out the old bearings and then press the new ones in place. I'd suggest going to a shop at that point. (I have done it a couple of times but it's easy to mess it up.)
On the other hand, cartridge bearings last forever without maintenance. If they roll smooth, leave 'em alone.