Quote:
Originally Posted by Bryce2471
Is the easier wheel change worth more difficult bumper mounting and greater stress in the structure?
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Yes, since the wheels have to be replaced between every match

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Nick most likely used plates instead of a piece of extrusion because it allowed him to maintain a decent amount of ground clearance. In order to do the same with a tube you'd end up tacking little plates on anyway, so you might as well simplify it.