[minimore1943]

I am looking to increase oem tire size on front and rear with the Continental extremcontact DWS 06 plus. Current tires are the 215/40/18 front and 245/35/18 rears with oem sport suspension, Style 261M rims. Want to use 225/40/18 front and 255/35/18 rear.
I have seen multiple posts saying no problem upsizing while others had rubbing issues in rear. Tire rack says rubbing issues. I also see on tire specs shown on tire rack that different tire brands with same size, 245/35/18, vary in their diameter, tread width and section width. i.e. Michelin for the 245/35/18 in PS4 is 25 in, 8.7 and 9.9 while the Continental DWS is 24.8, 8.3, 9.8.
The dimensions for the same two brands using 255/35/18 (diameter, tread width, section width) is Michelin
25.1, 8.8, 10.2 with Continental at 25, 8.7 10.2.
So I am assuming that the increase in tire size may fit if you buy Michelin versus Continental or Bridgestone.
Can any one help? Thanks