Ultralast Ball Bearing Wheels
Your review: We run a Family Entertainment Center. One of our attractions, Spin Zone Bumper Cars, had a problem with the rear caster wheel bearings, which were roller bearings, going out after 3 to 6 months. We tried several "heavy duty" wheels and had the same results. We switched to the Ultralast wheels with ball bearings and haven't had a problem for 6 months so far and don't expect to have that problem ever again.