The blog about nothing. Not that there's anything wrong with that.
I have discovered the perfect model of trolley, and sadly I've only been to one place in the world that has them, which is Hong Kong Airport. What you need is two non-rotating back wheels and a single, freely-rotating front wheel. That way, you avoid problems with fishtailing when your back wheels are wonky, and problems with juddering if you have unbalanced front wheels. I don't know why supermarkets haven't cottoned on to this design yet.You can see I've made something of an in-depth study here.
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