34's and odometer difference ?

[zback]

How much difference in mileage is there compared to the stock 275/55/20 vs my 295/60/20? Also what tuner is best to correct this?

[fondupot]

Use this website: https://tiresize.com/calculator/

 

Did the work for you.

 

 

Do search on tuners.

[JRL1164]

I used Hypertech's Speedometer Calibrater and found it pretty easy easy to use.

[Jon A]

Using the actual revs per mile of the brand and size tire (can generally be found on tirerack.com, etc) is usually the most accurate as they do vary.