Currently running 315/70/17s on 17x8.5 -6mm offset with 3.430 back spacing with a 2.5in Tbar level Currently no rubbing whatsoever. Thinking about getting some wheel spacers for a more aggressive stance. Would wheel Spacers cause the wheels when turning to possibly rub the lower bumper valence and/or splash guard in the rear of the well? Wanted to know before I buy so I dont have to trim anymore if they will cause rubbing.

 

Probably. But can say for certain. Your tires are sticking out farther which means the turn radius of your tire sticks out farther and will be closer to the valence. You can just cut the valence down so it doesn't rub if you want