jslayz wrote:225 is 9 inch, should be square.
You'd think so but if it were so it would be oversquare since the rim width is measured between the bead hooks on the rim.
Here's the LGT Wheel Rim and Tyre Sticky: FAQ: Offsets, Sizes for Rims and Tires on the GT! Xenonk Version!
Relevant info:
8.5" (+45mm to +48mm offset, +45) *will need to roll the fenders if tires are wider than 255
225mm = 7", 7.5", and 8"
235mm = 8", 8.5", and 9"
245mm = 8", 8.5", and 9"
19 in. rims (for GT 2005-on):
225/35/19 (common typical sizing for 19" for our cars)
235/35/19 (tallest tire you can mount without fender clearing issues on a 2" lowered car if you get the right offset)
245/30/19 (rare size, but also tallest tire you can mount without fender clearing issues on a 2" lowered car)
Heres an offset calculator to play with.
Offset calculator
And I'll dig up those handy comparative rim/tyre/suspension tools too. One of them included camber iirc
http://www.fitmywheels.com/
http://www.willtheyfit.com/
A Lib specific version of this would be nice:
http://www.frsproject.com/tire_size.php