I am looking into fitting 245/40/19 on my sedan or 245/45/18 (for 18s or 19s respectivly.)
Will the tire be too wide for the wheel? Will it cause a "snake bite?"
I referred to THX's thread, but am unsure as to the practicallity of tires that wide.

 

That is fine. 245's will fit on an 8" wide rim.

'03.5 Brilliant Silver AT Sedan, Premium, Aero Kit/Package, Sport, Winter, Stillen Air Box, Z pipe, Clear Corners, Alum. Pedals, Polk Tweeters, Clifford RSX 3.5, Gram Light 57F Pro's (on the way!)

 

What offset do you recommend for 18x8 wheels on the sedan? 45? Car is not lowered.

2003 Brilliant Silver Sedan 6MT

 

Check and see what you like best:

https://g35driver.com/forums/showfla...sed&sb=5&part=

'03.5 Brilliant Silver AT Sedan, Premium, Aero Kit/Package, Sport, Winter, Stillen Air Box, Z pipe, Clear Corners, Alum. Pedals, Polk Tweeters, Clifford RSX 3.5, Gram Light 57F Pro's (on the way!)

 

I'd like to go with 8" all around so that I can rotate. How come there's no 8" for the rear on your graph? Why would one get wider rears? Just more rubber on the road?

2003.5 Brill. Silver/Willow 6MT sedan, Premium/Winter/Navigation

 

Yes, basically. It gives it a staggered look, and it looks more aggressive. People usually like more rubber in the rear for better traction. In the graph, you can just extend the line from the rear fenders up (Print it out), and it will be accurate. I just put the rear fender dotted line for those wheels because they are more commonly used in the rear.

'03.5 Brilliant Silver AT Sedan, Premium, Aero Kit/Package, Sport, Winter, Stillen Air Box, Z pipe, Clear Corners, Alum. Pedals, Polk Tweeters, Clifford RSX 3.5, Gram Light 57F Pro's (on the way!)