beachboy23

I would be interested in knowing the diameter wheel/tire the current model GS300 is calibrated at.

I calculate a 3% difference in speedometer/odometer readings between GS400/GS300 16" factory recommended sizes 225/55R16 and 215/60R16. The 17" factory recommended tire is probably within that range too.

For larger wheel/tire sizes, I can only imagine that the speedometer/odometer readings are way off, and there's probably an effect on the ABS, etc. I doubt that Lexus offers a computer chip for the ECU to compensate for customization.

Comments?