EXTREME DUTY TROLLEY WHEELS, for LightRail 3.0, 3.5 and 4.0.
A suggested upgrade item for moving multiple lights and/or overweight loads such as heavier LED, plasma, or any light with an internal ballast weighing 35 pounds or more.
They are engineered with steel on steel ball bearing with a nylon over molded tire for smooth quiet operation. Rated up to 60 lbs per set and comes with a lifetime warranty.