No one lol? :) I got some Mini logos about a month ago, and the bearings on the back wheels started getting really slow and noisy after about 10 days, i reckoned since my weight is always on the back wheels and they almost never leave the ground (still can't ollie on this cruiser board), they get damaged more than the bearings on the front wheels? But i cleaned and re-oiled them with some sewing machine oil and they are good again.. if they got damaged somehow from the rough ground, cleaning them wouldn't do trick would it?