I'm going to be buying a new set of wheels soon in the stated size, but I'm not sure what size tires I should get. I see people recommending 225/45/17 or 235/45/17. Also, shouldn't the tires in the front be skinnier than the ones in the back? What size should go up there? Thank you!

W00t! Something I can actually answer!!! So, the first number XXX/45/17 is the width of the tire in millimeters.
215 = 8.46457 inches
225 = 8.85827 inches
235 = 9.25197 inches

Notice how much further out those will stick out on past your rims? If you are running 7.5" rims all around, I'd go with 225/45/17. I have 236/45/17 tires on the wife G and the lip of the tire sticks out so far past the rim it looks funny. The only good thing I saw from running a tire that wide is that it is now nearly impossible for her to curb check a rim.

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-Chris
'85 V6 SE 4sp (SOLD)
'88 GT - Series 3 SC3800 w/ 3.5" pulley, 1.8" rockers, 3" exhaust, 3.5" intake, 3.29 gearing. Installed and tuned by Sinister Performance
'99 Kawasaki Vulcan 500, owned since new
'03 Sentra SE-R Spec V (Prepping to sell)
'09 G37x Sedan w/ Premium & Nav (wife's car)
'13 G37xS Sedan (new daily driver)

I currently run 215/45's up front and 225/45's on the rear of my daily driver. The 215/45 is a perfect size for a 7.5" wide wheel in the front; it has just a little side-wall stretch and looks the best on the car. The 225/45 is about as wide as you want to go on the rear. Any wider and it starts to look goofy.

[This message has been edited by ITALGT (edited 03-15-2015).]

Also depends on the year of the car.
88's suspension allows for different wheels

I have an 86 GT.
And thanks guys, makes sense now! I'll end up doing 215 in the front and 225 in the rear.
+ for all