Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Do I have to update ECU, in case of changing a wheel size ?
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Old 09-17-2012, 09:33 AM   #6
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Okay, which mean i have nothing to do with ECU after all, I'd heard from my friend where it can correct mph, mpg, and even correct a gear shifting for a previous model. By the way, my car came with 215/50 -17 which mean I have to change to 235/40 -18 right ?
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