The problem with the Stingray wheels is they're not built particularly strong, and there's only one source for tubes and tires.
A lot of motorcycle and moped wire-spoked wheels are 36-spoke, which is a common bicycle count as well. Even many of the pre-WW I board-track era motorcycles used 36 spoke wheels, though some had 40 spokes instead. A motorcycle wheel shop can generally lace any rim to any hub you send them, if the two parts have the same number of spokes. Even just using spoked moped wheels would be WAY stronger than bicycle rims and hubs.
Motorcycle/moped hubs can be driven a lot harder of course, but many have the chain drive on the left side (opposite a normal bicycle chain) so if you want to have (or are required to have) regular pedals, that may be a problem.
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