I have an 05 RST Sierra with 22" regency wheels on 305/45/22 and bottom out pretty bad over moderate bumps and the tires rub the sway bar at about 85% lock both ways (purchased truck like this).

My question is what do I need to do to remedy this? What are yall running up front? This ground force 2/4 drop that came with the truck isn't cutting it!


For reference, here is a picture of the truck:

 

305/45 is a huge tire, might wanna think about a 305/40 or 35

 

A smaller tire will deffinitly help. I'm running a 285/35r22 and it still has some rubbing issues durring tight turns but the front does not rub on bumps or dips of any kind I think my offset is 35 for a 22x9.5 rim.

 

Running 305/40-22 with a 2-3 drop... doesn't rub enough to bother me. Only if I am backing up with the wheels locked.