This might be a little weird, but I noticed the speedo in my 12 X reads consistently slower than my GPS.. Is that normal? And which would you think would be more accurate?
A bigger OD tire than what the speedo is calibrated for will read slower, a smaller faster. Since you put a tire on that the speedo is calibrated for, it now reads correctly.I purchased my X back in 2005 new from the dealer. I just upgraded to 32's on my S and used the GPS reading. It read the same speed as on my speedometer. I figured it would be a little faster but didn't seem to be the case.