Starley of England devised the more modern bike with a chain and gearing to allow the wheels to be of equal size.

使用滚珠轴承及链条设计出了前、后车轮大小一样的现代自行车。

youdao

British engineer James Starley is, perhaps, most commonly associated with the iconic (and slightly ridiculous) Penny-farthing with its oversized front wheel, but the "safety bicycle, " which his nephew developed the first commercially successful version of in 1885, is the blueprint for most modern bikes.

ENGADGET: Engineering a better bicycle with DBC City Bike Design Alt