Review on Pneumatic Caster Wheel Swiveling Plate by Victor Olsen

This is a very cheap product. First, the wheels/tires are not round. The cart I put them on has a constant up and down motion. This affects the braking mechanism and causes it to touch the tire at least once per revolution. In doing so, a metal tab that actually touches the tire was bent so that it can roll freely. The roles are terrible. Everything works fine when pushing the car in a straight line or in a gentle curve. However, if you pull the cart back, causing the rollers to spin, it locks up about halfway through the turn. Inspection of the reel shows they didn't actually fill the raceway with bearings! After the thing was free to spin again, I saw a 1 inch gap between the bearings in the lower roller bearings. The roller has two sets of bearings, one top/bottom, but it is so loose that the bearings in the same race tend to overlap each other, causing stalling. Wheel/axle bearings are another bad design. The bolt they use for the axle is too small for the bearings they use in the wheels, it creates a lot of lateral movement between the wheel and axle. The bearings roar when turning, they apparently weren't lubricated when assembled. I need to replace the original wheels on our cart as the hard wheels made a lot of noise when driving on the tiled floors in our school corridors. These tires eliminate that noise completely, but bearing noise and a non-working wheel make this a very poor choice. I hope Revane takes things back.