I have put tires two sizes larger on and used my Smarty to adjust the speedometer but I'm wondering if this also adjusts the odometer. I haven't yet put a gps on it or checked with mile markers but curious if anybody knows if the two are tied together or independent? I noticed the speed was corrected the first time the dealer flashed the computer but the miles seemed to be off and off more then just indicated by tire change. With going to a larger tire yet I'm wondering if and by how much it is off. I will check with the gps and mile markers eventually but curious as to the other thoughts out there.

Thanks,