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mountainstem:打孔时怎么保证的新孔与旧孔同轴心的,这得钳工好几级的手艺了 (2022-04-27 20:57)
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琴飞扬:自己的体会:小轮径用短一点不怕,特别是410.412这种单速的车,要靠踏平来维持高一点的速度,你如果曲柄长了不仅使轮组影响转速,一但大力踩踏还会弹跳起来。公路车需要一定的扭矩使车启动,短的启动和爬坡非常慢 (2022-04-27 21:54)
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dpover:目测歪了点,其实上床并不难[表情] (2022-04-27 22:57)
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