Originally Posted by SparkieSRT6

I will be needing new tires in the spring and have been researching here on this thread. Now, I know very little about our BAS/ESP system but after doing some research on tire sizes I am questioning whether the differential between front/rear or stock to non-stock tire sizes would pose a problem and therefore affect the operation of the BAS/ESP system.

According to my online Tire Size comparison calculator (link below) our stock front tires (225/40/18) have a sidewall height of 3.5" and most members are replacing them with stock but some are replacing with 235/40/18 which have a sidewall height of 3.7". The stock rears are 255/35/19 which also have a sidewall height of 3.5" therefore matching the stock fronts. The two common replacement sizes being used here for the rear is 285/30/19 with a sidewall height of 3.4" and the 285/35/19 with a height of 3.9".

Having stated that, if one was to use the stock front at 3.5" sidewall and upgrade the rears to the larger 285/35/19 @ 3.9" sidewall, what effect would this have on the operation of the BAS/ESP.
I understand that several members have done this exact set-up without any issue but does anyone have a true understanding of our BAS/ESP systems and can explain what we really may be affecting?


Tire size calculator