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I'll be getting a set of 20's. Just waiting for a decent looking set to fit these things. Though recently in my searches it doubled from like 7 options to 15, so hopefully that is a sign of things to come.
 

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2021 Trailblazer RS FWD, Satin Steel Metallic
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It has a rugged look. Nice! Do you recall what the offset was? Looks like the tire is a bit proud of the fender. You may want to consider a set of mud flaps.
Went from the factory 43mm offset to a 40mm offset
 

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2021Trailblazer RS AWD Scarlet Red Metallic
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For the owners who have replaced their factory tires and rims with something new, how did you correct the speedometer? When you install a tire with a smaller or larger diameter than the factory tire your speedometer will either run high or low which affects overall mileage and warranty claims. I haven't seen anything yet for the Trailblazer that allows you to adjust tire size.
 
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For the owners who have replaced their factory tires and rims with something new, how did you correct the speedometer? When you install a tire with a smaller or larger diameter than the factory tire your speedometer will either run high or low which affects overall mileage and warranty claims. I haven't seen anything yet for the Trailblazer that allows you to adjust tire size.
If i know how fast i am going, then i would be lying to the officer when they ask me if i know how fast i was going. I would hate to admit guilt. 😂
 

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For the owners who have replaced their factory tires and rims with something new, how did you correct the speedometer? When you install a tire with a smaller or larger diameter than the factory tire your speedometer will either run high or low which affects overall mileage and warranty claims. I haven't seen anything yet for the Trailblazer that allows you to adjust tire size.
My plan is to go to a 245x40 R20. Calculators say it would be off by 0.1% on the speedo. Would read 60.06mph when going 60mph.
 

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My plan is to go to a 245x40 R20. Calculators say it would be off by 0.1% on the speedo. Would read 60.06mph when going 60mph.
That's close enough, no worries there.
 

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My plan is to go to a 245x40 R20. Calculators say it would be off by 0.1% on the speedo. Would read 60.06mph when going 60mph.
I’m in the market for new tires and wheels also, so I’ve been crunching the #’s like you. You will be fine, for all intent and purposes, both tires over-all Dia’s are the same. Your new tires are approximately 1/32 of an inch smaller than the factory 225/55/18. The average tire will lose more than that to normal tread wear. You will lose approximately 20% of your side wall or about 1” and if your wheels have the same offset as the factory ones your tire will only be proud approximately 3/8 of an inch compared to the original. For comparison my #’s were based on the factory RS tires and wheels. Make sure to post some photos when you have everything installed!
 

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I’m in the market for new tires and wheels also, so I’ve been crunching the #’s like you. You will be fine, for all intent and purposes, both tires over-all Dia’s are the same. Your new tires are approximately 1/32 of an inch smaller than the factory 225/55/18. The average tire will lose more than that to normal tread wear. You will lose approximately 20% of your side wall or about 1” and if your wheels have the same offset as the factory ones your tire will only be proud approximately 3/8 of an inch compared to the original. For comparison my #’s were based on the factory RS tires and wheels. Make sure to post some photos when you have everything installed!
Definitely! My goal is to go from a 7.5" wide rim (stock) to an 8.5" as well. I liked what I saw from the pics a guy had with 1" spacers on the factory rims. I just have to be in the 20-25mm offset range and it'll work to have the extra width stick OUT from the hubs, and make sure none of that extra width is going further into the wheel wells.

All those requirements really slims down the options to next to nothing at the moment though unfortunately.
 

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I'm thiinking about getting a set of Vision Cross wheels to put my snow tires on. I see someone has already got them on. Just wondering how you like them and if you had any problems. I have a LT with 225/60/17 tires
 

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2021 Trailblazer RS FWD, Satin Steel Metallic
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I'm thiinking about getting a set of Vision Cross wheels to put my snow tires on. I see someone has already got them on. Just wondering how you like them and if you had any problems. I have a LT with 225/60/17 tires
Yeah! I have the Vision Cross wheels with 225/60/17 Continental A/T tires. Love'em!
 
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