So I have a question and want to know if anybody else has this problem. All the freeways in San Diego have those groves in them like they took a rake to it when they laid the concrete making it a little wavy. I have 295/30/18 in the rear and when I get on it those little groves in the concrete take the tires wherever they want, usually making the rear of my car sway back and forth. It will even do it at normal driving speed sometimes too. The back end will just get jerked with the grooves in the concrete. On paved as-fault there are no problems at all so this is the only thing i can think of. Does anybody else in SD have 30 series tires and experience this too? I'm pretty sure I will be looking for 40 series tires but those are limited to like 3 choices for 18" rims.