[paul2684]

I have a set of 225 45 17 tyres fitted to e60 7.5j rims with 20 offset, my old winter tyre setup. Will they fit my 320i currently running 205 66 16 on 6.5j rims with 34 offset? No plans to lower or change suspension.

[Bluewater328iT]

That tire size is a BMW OEM size, so that's OK. ET 20 is very aggressive, but at least one member put Style 32 7 series rims with ET 20 onto an E90 and it rubbed a little, see post #7:

http://www.e90post.com/forums/showthread.php?t=565718

OEM BMW wheel offset are between 30 and 37. Most aftermarket wheel offsets are 30 to 40. Somewhere between 20 and 30 it might rub.

The other issue a 7.5" rim is rather narrow, although +1" over what you have now. It won't look as nice as the Style 32 7 series wider rim in the link above.