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devilpaul:提问:38-10的齿比,骑到30要多少踏频? (2015-07-21 12:40)
gznesta:有没16寸56T 带 11T 的速度? (2015-07-16 13:31)
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内容来自Android手机客户端
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melodia:我不信70踏频的14寸45-9能有24均速 (2015-07-16 10:54)
ShadowCk:我是用一个软件,以1.1的光头胎来计算的……如果是1.35的,速度就明显会下来。 (2015-07-16 11:08)
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Muscle玛士:14寸原装胎直径约34CM 周长=34*3.14=106.76 牙盘50T算牙盘/齿轮*踏频*60分钟*轮长 50/11*70*60*106.76=20.38km/h....... (2015-07-16 15:49)
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老年大力士:我的412齿比47-9但我从不过超20码,悠着点要快有摩托[表情] (2015-07-21 13:14)
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