They vary - more active chairs have smaller wheels - mine are 120mm.
I’ve seen smaller and larger wheels on scooters - but you don’t have your knees/ankles providing suspension in the way you would on a scooter - it all goes straight into your body.
It’s also rarely practical to “get off and walk” so you have to deal with the full length of whatever fancy surface the council decided would look nice, whilst fighting the camber trying to throw you off the curb and into the road (which it doesn’t do to a two wheeled scooter).
Biting the hand that feeds IT
