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Hypertech Speedometer Calibrator – Accurate Speed Reading

$249.95 on Amazon.com (as of July 10, 2026, 4:34 AM EST) View details ↗

Hypertech 730126 In-Line Speedometer Calibrator ensures your vehicle’s speedometer displays accurate readings after altering tire sizes or rear gear ratios. Whether you’ve upgraded to larger or smaller tires, or installed a new ring and pinion gear set with a different ratio, this calibrator corrects discrepancies caused by your vehicle’s computer, which relies on stock tire dimensions for calculations.

Installation is straightforward—simply plug the in-line module into your factory wiring harness without any splicing required. Designed for vehicles with computers that don’t support manual tire or gear ratio adjustments, this calibrator eliminates limitations on tire height or rear gear modifications. Trust Hypertech to keep your speedometer precise and your drives worry-free.

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