直径差异
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| 指标 | 轮胎 A | 轮胎 B | Δ |
|---|
计算原理
P 制规格 宽度/扁平比-轮毂：胎壁高度（mm）= 断面宽度 × 扁平比 / 100。轮胎总直径（mm）= 2 × 胎壁高度 + 轮毂 × 25.4。周长 = π × 直径。每英里转数 = 1 609 344 / 周长。
在显示车速下的误差 = （轮胎B直径 − 轮胎A直径）/ 轮胎A直径 × 显示车速。正值表示更换轮胎 B 后，实际车速高于仪表显示值。
🧰 其他换算
轮胎尺寸对比计算器（升级选配）
比较任意两种轮胎尺寸（例如225/45R17与245/40R18），对比整体直径、周长、时速表误差百分比和离地间隙变化。
别名
tire size comparisontire size calculatorplus sizing calculator
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