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y279995578:没图没真相[表情] (2014-09-20 15:35)
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y279995578:[表情] 链条离轮子靠的也太近了吧,刹车皮也有点过长了。 (2014-09-20 15:41)
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内容来自iPhone手机客户端
fys1005:看图说话,我也改了412,28/11的齿比,127曲柄,可以猜到楼主小孩的姿势:可能考虑孩子脚着地的安全,坐垫过低,曲柄过长,脚踏最高点膝盖弯曲幅度大,骑车变得不那么轻松。至于车速,38/11齿比对7岁小孩绝对是让家长害怕的速度 (2014-10-21 16:10)
内容来自Android手机客户端
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