Jtvegas
New member
I have used my procal to calibrate my speedo. I have 35 inch tires and measured properly around 34. I have double checked all the proper settings however to get me speedo correct I had to set the procal all the way down to 31.00 with 35's. Aev states all jeeps are different and this is ok just keep going down till you get the proper speed and using handheld gps?