So I finally had time to pull the wheels and do some measurements. Current setup is 17x9 with 6” backspace (+1” offset)
17x11 with 6” backspace (-1/2” offset). I’m thinking of upping the to 18x9 and keeping same dimensions due to the 245/35-18 being a little wider tire. The existing setup is pretty close to full turn fender rub about 1/2” The rears 18x12 with 6” backspace would push the tire closer to flush of fender lip. Can’t really go wider or pull wheel in more because it’s already close to exhaust pipe and 335/30-18 should work. The car has adjustable coil overs on all corners and wilwood disk brake conversion all around.
Do my calculations look correct?
To be clear with builder 62 mm bore and 5x4.50 bolt pattern?
Thanks