Hey everyone, I have a 2006 Saturn ION Redline, and I recently changed my tire size to 225/40-18 all around. I adjusted the tire size under Speedo in HPTuners, but it still doesn't seem to read right. Is there anything I'm supposed to put in the box labeled "Gear Ratio" underneath it? It made me enter a number so I just left it at 1.00 which was the current setting.
Thanks.
