The chain drive represented a fundamental engineering trade-off by sacrificing which feature of the direct-drive Penny-Farthing?

Answer

The pure, large-wheel mechanical advantage

The chain drive allowed designers to shrink the wheels for safety and stability but gave up the immediate mechanical advantage derived purely from the massive diameter of the Penny-Farthing's front wheel.

The chain drive represented a fundamental engineering trade-off by sacrificing which feature of the direct-drive Penny-Farthing?
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