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Discussion Starter · #1 ·
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?
 

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2021Trailblazer RS AWD Scarlet Red Metallic
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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.
 

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Discussion Starter · #3 ·
Got it, appreciate the response, yeah 20 not sure. I am not wanting to look like I drove out of a rap video lol.
 

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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.
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!
 

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I would encourage you to not get larger wheels unless you really don’t care about the ride quality and road noise both taking a downgrade (also just seems kind of wasteful to throw out perfectly good tires and a set of machine alloy rims, but that’s just me shrug)
 

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Discussion Starter · #7 ·
Totally get it, not really looking into 20's , more then likely will put new 18's . Personally I just like my vehicle to look different than the next one.
 
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