Steering Vibrations

Hi guys. Was wondering if anyone had thoughts on steering wheel vibration? I added a Ready Lift 3/1 leveling kit, with the differential drop, to my stock 2013 Crewmax recently. Running the stock 255-70R18 Bridgestone Dueler everything felt ok. When I added some 20x9 wheels with 12mm offset and 305-55-20 Toyos I get a vibration around 45 mph. Seems to come and go and is more noticeable when things are cold. Love the look, unhappy about the ride.

 

I had the Road Force Balance done a Firestone, no good. I have been playing with the PSI in my front tires too, no good. Any know of a good 4x4 shop in the Dallas area that can investigate this? I wish I knew someone else running 33's, I'd love to swap them and drive both trucks. Then I could see if the problem followed the tires or it was my truck.

 

I have 285/65/18s Nitto Trail Grapplers (33s) and I get some vibration at those speeds. I just figure that's what happens with larger tires. I've thought about those beeds but the science makes it sound like bullshit.

 

I had the same problem... it turned out to be the lug nuts. The ones discount tire sold me first didn't seat the wheel properly.