WOT gear change...0-60 times....

[Power Hungry]

Originally Posted by Chris74

Bill: My custom tunes were built without me specifying any change from the stock TS/GR!
My truck has 3:73's and stock 275/65 18's.........do you recommend I touch the TS/GR settings or not?
Currently I have my snow tires on and they are 265/70 18's.......again, should I just leave the settings alone?

275/65-18 = 2503mm
265/70-18 = 2543mm

Difference = 1.5% or about 1 MPH at 60 MPH. It's up to you, but if you want the speedo to be dead accurate then you should change it.

When running the stock tires, leave the TS/GR alone.