Hey guys, I'm having a hard time figuring out how to re-calculate my miles with larger tires. I had 265-70-17's and now went to 325-60-18's. I know that the Odometer is off and of course the overhead is probably off as well. I went through my first full tank and show 470 miles on the odometer. I saw somewhere on the forums where somebody made a chart for re-sized tire calcualtions.
The 265's= 31.61 in diameter
The 325's= 33.35 in diameter
Don't you divide the larger by the smaller and that gives you the difference? I'm stuck so please help me out here.
Thanks
Scott

 

1-Old diameter/New diameter. You're about 5% off. So 1.05x470=494 miles.

 

Click Here for a very nice tire calculator. Gives no doubt to what you'll see. I've checked several tires and they are always right on!

 

WOOD, go to 4lo.com cool site and has all types of tire calculations, gear ratios thinga like that. late