Innotech Designs has a "P2 anti scalp wheel with industrial strength ball bearings....designed to fit a variety of commercial mower decks" Has anyone heard of these? They have sealed bearings. A Google search turned up nothing. The notice is in the West Turf magazine for May 2005, page A6. I would like to use something like this to replace the greaseable anti-scalp wheels on the Kubota ZTR mowers.