Great tool for the job
After getting rid of the performance robbing 20-inch wheels and tires and installing base model 245/70R17s, the speedo needed correction. Knowing the exact percentage of the change unfortunately doesn't help, so it's a bit of trial and error to get it right since tire height is the only usable criterion. With 30.6 inch tires, and no static loaded radius data, I guessed and used 30 inches. Very, very close. Tried with 30.25", but went back to 30, which is quick and easy with the Hypertech.
DodgeRam 1500- Centerville Ohio
I had my doubts about this Tuner but I was wrong. I have had this about 3 weeks now and initially I could tell the quicker take off. Then I went on a Easter trip to Missouri (500)only this time I was getting 20-22mpg/ 16-17 @75mph and I still had kick. To Missouri and back I averaged 20-21 mpg and was happy and the power continues to improve. Now that I have installed a K&N filter I think things will even get better. I would definitely buy this product again.