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Behold The Hyundai Uni Wheel. Transportation May Never Be The Same
(cleantechnica.com)
This is a most excellent place for technology news and articles.
Having these gears in the hub instead of a motor would decrease unsprung weight.
~~The gears are necessary to allow the wheel to move without having to move the input shaft.~~
Edit: sorry, I misunderstood your comment. I agree.
Somehow I thought you're saying the gears should be attached to the motor.
I didn't think about that. Thanks for pointing it out.