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How do I configure a Model S for 20" wheels?

應用驗證結果如下:
ET值=鋁圈圈-1mm
J數+1=鋁圈寬度+25.4mm
但是以除2同樣要外移的mm
所以同樣ET值=>鋁圈+1J=外移12.7mm
鋁圈+0.5J=外移6.35mm
鋁圈+0.1J=外移1.27mm

(輪J值,指輪圈的寬度,也是耳圈內圈到外耳圈的距離,單位是英吋,所以1J=25.4mm)

前:ET30 (原40) =>外移ET40-30=10mm
後:ET30(原40) =>外移ET40-30=10mm-(0.5Jx6.35mm)=3.65mm

8.5J
(21原8.5 9J)
(19原8J)
四輪都用245/40r20
稍後確認 255/40/20 更好的選擇
 

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