Wearresistant and pressureresistant construction The climbing wheel features a tripod made from quality stainless steel for scratch resistance and stability on complex terrain or under heavy loads. The outer layer is rubber, providing exceptional wear resistance and longevity for outdoor use. Smooth rotation and effortless movement A triangle pulley design ensures smooth, unobstructed movement across various terrains. The pulleys glide seamlessly on flat surfaces and while climbing stairs, making pushes easier and more efficient for stairclimbing carts. Three models for diverse needs and precise compatibility We offer three cart pulleys to suit different preferences. Axle length must be 50 mm (1.96 in) or longer. Axle diameter should be 7–8 mm (0.27–0.31 in) for use. Onebutton disassembly for easy maintenance The trolley assembly roller includes a onebutton disassembly switch for easy removal with a single pull. Installation is straightforward: when attaching, press the wire snap until the wheel is seated into the rod of the shopping cart and cannot be released. Use scenarios Moving heavy boxes up stairs in warehouses or delivery settings with a stairclimbing cart. Transporting camping gear or outdoor equipment over uneven terrain or steps during recreation or expeditions. Replacing wheels on shopping carts or utility carts to improve ease of transport in homes, workshops, or light industrial environments.