Post #477 386 Mar 27, 2025, 14:26 UTC 非常巧妙的设计,有两条链条的自行车:1. 一条用于平地起行,一条用于爬坡;2. 两条链条都在同一个牙盘和飞轮上,只要往后踩就可以切换两条链条;3. 同时,这两条链条也互为备份,增加了冗余。https://youtu.be/NnSWDKfT7FQ YouTube Why 2 Chains Make This Bicycle WAY BETTER The Buffalo Bicycle S2 is a robust, utilitarian, and serviceable bicycle made to help the most remote communities on the planet. What makes it unique is that it has two chainrings, chains, and two freewheels. Today, we will closely examine the S2 and show…