These portable wheel risers can be used to load trucks or trailers onto a loading docks for more effective loading and unloading of goods. These trailer ramps can support up to 40,000 pounds. And unlike scooter ramps, these truck ramps are not for extreme fun. We also carry other ramp models, including walk ramps and wheelchair ramps. Zoro has other loading dock equipment, such as dock plates and boards and dock wheel chocks to make your loading chores more efficient.