Here we have a selection of steel tread wheels and casters from top manufacturers. Choose industrial replacement wheels from 3" to 8" in diameter based on your needs. Bigger wheels are easier to start rolling and usually can roll over objects and debris easier than small wheels do. If you are shopping for Ductile steel wheels the crowned versions are considered energy savers because the slightly rounded tread makes swiveling the steel wheel caster easier than a flat tread wheel. Most of these wheels available come with roller bearings because steel wheels usually roll best with roller bearings.