Wind Resistance We’ve slowly learned something about wind resistance and electric cars. More wind resistance cuts mile range a lot. A trailer hitch bike rack behind the car is like an abstract art installation parachute. Bikes don’t go sideways. But, in the meant-to-be smooth airflow behind a Tesla, sideways bikes create suction. On our trip from Seattle to Oakland, we were alarmed by our battery consumption: 100 actual road miles were costing us 200 e-miles.