Quote:
Originally Posted by finch1750
Speedo is based on overall wheel/tire diameter. 18s with the correct specs can maintain correct speedo accuracy (or at least very close)
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This is true,
I just meant that you cant' just drop the car and get 18"s to raise it back up and cancel the drop while filling the wheel gap. If you did that the tires are likely the wrong size and the speedo would be off.
If you got the correct specs for speedo accuracy then the wheel/tire diameter on the 18's aren't going to be that much different than the 17's so you're not going to gain much height back.