M5 Guru (>2000 posts)
Join Date: Jun 2009
Location: Liverpool, England
Thanked 691 Times in 398 Posts
dude i don't know about the offsets but are you sure the tyre sizes are right, as in the aspect ratios? It seems as if you have them mixed up.
They should be 275/30 R19 on the rears and 245/35 R19 on the front. If what you stated first are the actual sizes then they are wrong. The fronts will be too short in overall height and the rears too tall, and you may get fender issues as well as speedometer reading s being out.
If they are as i stated or you swap over to those sizes, provided the offsets are OK you shouldn't have any issues either with rubbing or suspension, stock or lowered