蔡华风 2019/12/19 10:48:44 发表在 11楼
算一算:原车胎195/65r15 直径(立高)195x0.65x2 15x25.4=634.5mm新胎215/50r17直径(立高)215x0.5x2 17x25.4=646.8mm新胎比原胎大646.8—634.5=12.3mm原胎周长634.5x3.14=1992.33mm新胎周长646.8x3.14=2030.952mm新胎周长比原胎长2030.952—1992.33=38.622mm行驶1公里,原胎滚动圈数10000x100/1992.33=50.192(圈)新胎滚动50.192圈(1公里)比原胎多50.192x38.622=1938.515mm=19.38515m行驶100公里,新...
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