I know there’s a ton of threads on wheels and tires. I’ve looked for a bit but really would like a confirmation. I have a 2017 IS350F w/ Avant Garde M520R wheels 19x8.5+33 and 9.5+38. I’m lowered very modestly on Swift spring (about 1”). I would like to run meatier tires, honestly I like the looks of a thick sidewall. I run Fire Hawk Indy 500s, great tires for what I need and location. Can I run 245/40/19s and 265/35/19s? The diameter on these would be F: 26.7 R: 26.3 (very very close). I know the sidewall is not much of a difference but I’ll take what I can get here.

Let me know if I wrong thinking these should fit just fine.

 

You can probably go with a 275 30 19 at the rear
I’ve been running those on my 17 is300
fsport for a few years now without issue.
They tuck in nicely at the rear .

 

Not sure how this advice helps at all since a 275/30 sidewall is shorter.

 

Bump - anybody running these sizes or can confirm this works? Chat GPT seems to think it will.