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

Great product. I put new tires on my Ram 1500. Were 275/60R20. Went for 65s. They knocked out my truck. Went from an average of 18mpg to 14 and drops. The truck will no longer go into eco mode on the freeway unless I'm driving at 55-60 mph. Got this little device, followed the simple instructions. It is important to know that when connecting, it will ask for the tire size in inches. So google the tire size in inches beforehand. Mine was 34.3 and the car gave me a choice of 34.25 or 34.5. I mention this so you know you may not get an exact answer. Just select the closest one. In this case, the nearest was 34.25. It only took a few minutes and everything was ready. Now my truck is back up to an average of 18mpg (city/highway) and economy kicks in even at 80mph. Note. It took about a week for the gauges to show an improvement per mpg, but that's because you need to give the math time to work. The power was easily felt and my shift points were back to normal. It also reads DTCs. Great car and worth the money.