Thanks for the detailed advice, I think I'll just take them to the shop -- the bearings should be fine, since the bike rolled perfectly and I thought it must be the chain making the noises, then I took it off and it turned out that the hub is making the grinding sounds, hopefully re-greasing them will do the trick and doing it in the shop will be most likely be cheaper than to buy a tube full of decent bearing grease :) and I only have two adjustable wrenches -- maybe somebody who knows what they're doing could open the hub with just that, but not me
Thanks for the detailed advice, I think I'll just take them to the shop -- the bearings should be fine, since the bike rolled perfectly and I thought it must be the chain making the noises, then I took it off and it turned out that the hub is making the grinding sounds, hopefully re-greasing them will do the trick and doing it in the shop will be most likely be cheaper than to buy a tube full of decent bearing grease :) and I only have two adjustable wrenches -- maybe somebody who knows what they're doing could open the hub with just that, but not me