This is printed in two parts. I believe it is functional. The gearing will match a re-winding of around 50-60 KV. The bike wheel top speed should be around 250-300 rpm. So we should aim for around 2500-3000 rpm on the motor, depending on gearing etc.
Just rediscovered printing with 0.8mm nozzle. 0.8mm really does make string walls/structures, fast.
Yes, those are some nasty wheel bites, I strained a rib on that one…
You can drill 3mm self-cutting screws into PU (78A) wheels. Getting the gear centered is a challenge, maybe if the wheel is locked in on the fitted bearings and 8mm Shaft, it will help align it.
The challenge, of course, is to transfer the motor power to the wheel, in a optimal manor, while maintaining low current draw. So a rewind to lower KV is mandatory, if the goal is to keep it withing the legal 250W nominal power consumption. 250W translated in a good way will be a decent overall input to the drivetrain. Unless you want to trough aloha amps @IT
The wheel will need to be tightened to the bike frame, the Shaft is supposed to stick out like that.