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  1. J

    Temp spare tire diameter vs. OE size

    The Explorer ST T165/70D18 temporary spare has a 27.1" diameter vs the 31.0" diameter of the 255/55R20 OE tires (or the 30.8" diameter for the 275/45R21 size). That's a pretty big difference in rev/mile. Does anyone know if the electronics of the drivetrain cancel out any worry about what that...


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