Someones really sat down and thought about what we need a shopping trolley to do and were delighted to say this new design is the result when youre on your way to the shops and the bag is empty or if carrying much lighter loads manoeuvrability is at a premium this is when the trolley is best in two wheel mode pulled along like a conventional shopper but when you start to load it up with a weeks worth of provisions two wheels are not enough even with the additional stabilising bar