Review of Kinetic Trampolines Trampoline with Enclosure, 14ft Weight limit: 275 lb. Our Rating: Recommended Age: 12+ This 14 feet trampoline is one of the cheapest around that we’d be confident to recommend. It’s a basic unit but there is nothing particularly wrong with it. In fact, there are 6 U-shaped legs which gives it extra stability compared to some more expensive models. It comes with neatly shaped enclosure poles.