These wheels are functionally very useful and sturdy, however, that functionality is vastly overshadowed by their noxious and offensive odor. If you're planning on using these wheels in an open-shop environment I am sure they will work well, but any confined space or environemnt where air quality is a consideration should be avoided. The odor is reminiscent of petrochemical or tar production and is overwhelming if there is not active and forced ventilation. It's been over 2 weeks since I cleaned and attempted to let them off-gas and the odor just seems to be getting stronger.