Tri-Wheels Climbing Dolly Equipped with 6 stair climbing rubber wheels that are wear resistant and no-slip. No noise but move smoothly. Lightweight industrial-grade trolley helps carry heavy objects on various roads, such as grass, cobblestone paths, concrete roads, etc. Strong Loading Capacity Upgraded stair climbing cart adopts thickened aluminum alloy frame-21mm steel pipe and 2mm bottom plate but weights only 8.6 pounds. It is lightweight but strong, which can carry 300 lbs on the ground and 180 lbs when climbing. It is also comes with one elastic rope to keep stable operation of the goods.