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Title: Defective wheel lead to deterioration in function
Review: I've had a similar one of these before, from a different company, but this one kinda sucked. It worked OK for about a week or two. Then it started to feel like the wheels were always dragging, even though they were clear of all debris. I've figured out that it doesn't seem to click into the open position all the way for some reason. So, unless I have something heavy on it, the wheels start to collapse. And even when I do have a load, the wheels cause a big drag. Really frustrating.
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