Review on 🏎️ Enhance Speed Accuracy with Rough Country Speedometer Calibrator for 2018-2020 Ram 1500 Truck - 90019 by Matt Lewis

This product was very easy to use, just plug it in and follow the instructions. I have a RAM 5.7L 2019 with 35x12.5x20. At highway speeds I was 4-5 mph faster than my speedometer showed using Waze and the speedometer app. I googled my tire sizes which came up with 34.53 inches but using a tape measure shows around 34 inches. I first tried using 34.5 during reprogramming but the speedometer showed about 2-3mph slower than what the apps showed so I went with 34 inches and the apps seem almost there. Not sure if it is. Perfect sensor with apps but it's enough to satisfy me. However, the price of this product is a bit high as you can buy a code reader for $20. I'll update the review if I notice any shift point changes!