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图片:QQ截图20131213213029.jpg
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引用第8楼150448215于2013-12-13 22:26发表的 :我个人的理解应该是曲柄与中轴是与牙盘分开的,曲柄给牙盘压力的时候弹簧会缓解牙盘带来的阻力,之后弹簧受压释放以后给牙盘一个推力完全是猜测,不知对否
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引用第16楼coojake于2013-12-13 23:59发表的 :你们都错了~这是山地牙盘~给硬架一个类似软尾的功能~减轻下山时的颠簸
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引用第13楼逍遥叹于2013-12-13 23:06发表的 :这玩意儿有必要么
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