Been debating on getting new 18 on my 2022 Rs, or 19? 20 not sure. Anyone have any pros or cons s what they would do and why?
245x45xR20 is the tire size I found that would be 1" wider, but within a 0.1% difference in diameter, aka the exact same readout!20's will fit, buy I wouldn't go any bigger. The most important thing to consider is tire size with the new rims. If you don't end up with the same diameter tire as the factory tire your speedometer will be off and GM can void the mileage part of the warranty. As far as I know there currently isn't any way to adjust the tire size in the computer since it's locked by GM. If we had the ability to change sizes then it would be ok to have smaller of larger tires. It's possible GM techs might have the ability to change sizes for you in the computer, but you'd have to ask the service dept if it's even possible.