I have a set of Reynolds Assault wheels with about 2000 miles on them. Should the rear wheel require any maintenance at this point? It rolls fine (when spinning hand, the weight of the valve stem and computer magnet will still result in momentum pushing the wheel over for another 3/4 revolution) but it's probably my imagination, but the hub seems to be a little louder than before when coasting....started to think so the last two rides. Thoughts???