Looking at an aggressive rear offset for my CTS Coupe which would bring down the current stock rear offset (tire stick out 20mm more) from+32 to +18 with 9.5" wheels instead of the stock 9.0's, and would also push inside clearance outboard 8mm. I know this could affect bearing life and more critical on front but is this any major concern for non turn rear?
How much tolerance?
20mm more stick out looks like just enough to even out with fender line but not over it.