|10-30-2012 01:17 PM|
This is because the odometer is drive off the speedometer.
Best way to figure out exactly how far you've travelled is to get a GPS and do a few trips of many miles. Compare the odometer and the GPS log to see how far off you really are.
|10-30-2012 11:45 AM|
|MercMan||Google it as there is a calculator out there somewhere. I have 265's on mine where it is supposed to have 225's. The calculator says I am about 7% out meaning you would add 7% to you mpg calculation.|
|10-30-2012 11:37 AM|
|lindel||There are charts all over the internet that will tell you what speedo gear you need to offset the increase in diameter of the tires.|
|10-30-2012 02:04 AM|
|Rooster76||Bigger wheels have a larger circumference , and travel more per revolution. The jeep is not going to auto-magically take that into account. So your mpg is going to show low. You would need to add in the percentage of difference in the circumference's to the mpg.|
|10-30-2012 01:45 AM|
|Kota7x||Yes changing the tire size will affect how the readout on the odometer moves. It should slow down if I am not mistaken.|
|10-30-2012 01:29 AM|
Tire Size Affecting MPG
ok so i know the changing to a bigger size tire will affect the speedometer. In my case, 27" tires to 31", i will be traveling about 15% faster than what it tells me.
My question is does the difference in tire size also affect the difference in how many miles it says i traveled?
im sorry but its hard to believe that my 4cyl is only getting 14mpg. its a manual and i would consider myself a conservative driver......most of the time...