Can you explain the physics of rotating mass savings being more important? The top of the wheel moves twice as fast as the bike, but the bottom of the wheel doesn&#x27;t move at all so don&#x27;t they balance out? The frame isn&#x27;t static - you still have to accelerate it frame along with the wheels when you&#x27;re speeding up.<p>If your route has a lot of uphill, then I&#x27;d expect that 1.5:1 ratio to get closer to 1:1 where the work you do is more fighting gravity than inertia.