Typically, a good collapsible wagon can hold 100 to 200 lbs of load. With this carrying capacity, you can already transport heavy outdoor equipment from point A to point B. You can bring a beach umbrella, cooler, tent, a pair of beach chairs, and other small essentials in a single trip. The following products fall under this category:
Creative Outdoor Push Pull Wagon
TMZ All Terrain Utility Folding Wagon
YSC Folding Beach Wagon
Some heavy-duty wagons have a maximum carrying load of over  200 lbs, such as the following:
Gorilla Carts GOR400-COM
Portal Classic Portal Wagon
Sekey Classic Folding Wagon