Bike mounted on hitch rack.
Why wheels spin constantly while I drive?
I can't find anything on the internet. The kids in the other cars love to watch them
Bike mounted on hitch rack.
Why wheels spin constantly while I drive?
I can't find anything on the internet. The kids in the other cars love to watch them
The air flow around the car creates a vortex. There is an image of the air flow around a car:
which was used by this earlier answer - that rotating air behind the car is what spins the wheels of the bike.