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speedometer

  1. Changing Tire Circumference in BCM/PCM vs Hypertech 730125 Inline Speedometer Calibrator

    Does anybody have experience using one of these Hypertech units to re-calibrate the speedometer? I changed from 255/65R18 to 255/80R17 tires on my 2025 Ranger XLT 2.3 and now the speedometer is a couple mph lower than the actual speed. It seems like this device just corrects the speedometer...



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