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才来:决定车速的因素:1、速比。速比越大理论上速度会更快。速比=大牙盘齿数/小飞轮齿数*轮径。2、体能。这是关键。没力气踩不动,再好的车子也是枉然。3、重量。包括车手的体重和车子的重量,当然是越轻越快的。4、车胎。越细阻力越小,就会越轻快。....... (2016-02-26 09:39)
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