This is not true, RX8 wheels are 18x8 with offset +50 and 235x40x18 fit just fine...My MS3 has these with no issues. BTW, I kept these wheels out of my RIP RX8 so I know these wheels very well.
Carlos
ok so they are +50.
unless you are going to go with a stretch the tire a 10" wide rim requires at least a 255 wide tire. I'm gonna go with a 9.5 and 245s