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Re: Cantilevered drive wheels?
non-cantilevered wheels are easier to mount (just drill two holes and poke a bolt thru them). They also have an outside frame member that protects the wheels from damage, or from getting flat tubes tangled up on them.
Cantilevered wheels can be easier to work on, since there's no frame member in the way. They also can offer more tipping resistance, as they can be located at the outer edge of the 28" wide robot footprint.
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