輪胎厚度寬度比決定抓地性能，如賽車用得胎比較扁既數值小。輪轂變了比值也變，但輪胎外徑不變，

來源: obamacome 於 2015-09-05 20:15:19 [舊帖] [給我悄悄話] 本文已被閱讀：次

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