| On my E46 328i, I've got the 16" forked wheels. They came from the factory with 205mm tires, but are able to handle 225mm. In the wheel well, you can go as high as 235mm in the front and 255mm in the back, of course on different rims. If your buddy's got his E46 car manual on him, tell him to check in it, it tells you exactly what you need to know through a tire size chart somewheres in the middle i think.
I really don't know how wide you can go on THAT 15in rim. Rather small, but rubbing shouldn't really be a problem if the front wells can handle up to 235mm and upgrading from a 195mm to a 205mm shouldn't rub it. Then again, I'm no mechanic.
Dough
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