Originally Posted by sayemthree
of course wider is usually better to some point. but if your set up is prone to obverseer why not try 265 up front?
I agree with this. On my e46, I like a square set-up for the street, but on the track, I'm happier with a staggered set-up (265F - 285R). If this car is more prone to oversteer like others have said, a staggered set-up is called for.
But back to the original question, I don't think there is a lot of room in the rear for much larger tires than stock, unless the offset is changed to something like et30 - et35. Then you have to worry if there is enough room to the inside. I'm actually surprised a 295 fit. Did you check to see if it clears with the suspension loaded (eg at the track)?
Unless I get a very good price for them when I sell the e46, I intend to run my BBS REs on the e90 for track days. 10.5x18 ET28 rear with 285/30-18 PSCs and 9.5x18 ET35 in the front (with 10mm spacers) and 265/35-18 PSCs.
My street set-up, if I confirm it works, will be two sets of OEM 18s. Square set-up of 9.5x18 with 265s in the summer, and square set-up of 8.5x18 with 245s for winter.
My 2 cents worth.