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Do you reckon a track cyclist would be exactly as fast on the same bike with a freewheel?
Yes. When riding a geared bike with a freehub or freewheel on a track, you never hear the ratchets in the freehub or freewheel working while you're pedalling. If the ratchets aren't working then it is functionally no different to a fixed drive train, because the ratchets are the only things allowing it to be not fixed gear.
Obviously you can generate forward torque through the whole turn but you can still apply the most power when the cranks are vertical. If it's not true that the cranks carry more power through the deadspots on a fixed, then what are the benefits of a fixed gear drive train when compared to a single speed? Do you reckon a track cyclist would be exactly as fast on the same bike with a freewheel? So the only reason for a fixed drive train in track cycling is the tradition?