ozz4 said:
Post from "Bimmerforum"
These offsets make sense when you think about the departure from std
"I have fitted 20's to my M Coupe."
So, do you have an M Coupe or a non-M coupe?
They start out with difference offsets from the start as they have different rear track (maybe the axle is physically different too).
I know guys who claim to have fitted 275 on the rear without problems, "never rub at all, even when fully loaded" they said. First trip where I was a passenger in one it got 100 yards down the road, went over a speed bump at about 1mph, landed on the other side and went 'crunch'.
"What was that?" ask I.
"I think it's another spring gone, I've replaced them 3 times already." says the driver.
"Are you sure it's not the tyres rubbing/fouling the arch?" I ask.
"No, it can't be, as there's people on the internet who say they've got the same set-up and their's don't rub/foul either." claims the driver.
I'm sure everyone here wishes you the best of luck in fitting whatever modifications you wish, but I don't think most people here would want to be party to you damaging your car.
The picture of that one you posted shows it's lowered as well, so may have aftermarket coilovers, which will help in reducing the chance of rubbing as it's different suspension parts, but he's still probably going to hit the tyre/rim on the rear arch when he's pressing on (I've done it at the 'Ring with 265s on), or catch the arch-liner on the front when turning sharply.
If you never drive quickly and purely want 'all show, no go', then I'm sure you could make anything fit - but don't expect any sympathy when it goes wrong.
If you can't work out how to use that offset calculator I posted a link to - which won't tell you what will fit, only what offset you'll need to move the wheel more in/out board - then sorry but I've got nothing else to offer :|