What is the safe and larger tire size I can put on my G37S coupe stock 19” wheels without adding any supporting component.

I m getting swift lowering springs with KYB struts.

currently she sits on front 225/45/19 with rear 245/40/19. It’s a daily drive so I don’t want to go harsh on myself and the car as I intend to do this change for the looks and stance. Also I did my research that this will not hurt my gas mileage significantly rather it will add on driving pleasure.

thanks y’all

 

I also have the stock 19's and currently have 255/40 in the rear and 245/40 in the front. I am on tein coils and haven't had any issues. All my linkages and arms are stock and look to be in decent shape from what i can tell visually and by driving. Hope that helps a bit!

 

Im running 245/40/19 on the front, and 265/35/19 on the rears. The 265 square up nicely without any mushroom. I didn't wanna go 275 on the rear because sure guys in 370z are doing that but our rear rims are a tad less wide than theirs. I wanted the least amount of tire flex/roll over possible since i track my car. Oh do try a set of bridgestone potenza Re71R tires one day, They are fantastic!