Tires are properly inflated.
Engine is turning a consistent 1500 RPM with foot off gas after topping hill and heading down. Idle is normally half that. The engine sounds like a downshifted standard transmission with clutch out. Speed does not increase going downhill. The feeling of engine braking is palpable.
Theory is a nicer and more science oriented word than conjecture.
My theory is that there is engine braking going on in a pedal-off downhill coast.
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