shakey wheel over 60 mph.

I had 15" stock wheels on my truck. So I bought some 16's with a larger tire. I fits my lugs but not the hub. My steering shook really bad above 50. So I had them balanced, and had some hub centric 1/8" spacers made. Wheel still shakes but not as bad and only 60 mph and up. I'm not happy with the steering. Is there anything I can do to fix this. Suggestions? Tips tricks? Anybody? Thanks. Besides put the stock wheels back on.

 

Where the wheels/tires statically- or dynamically balanced? Dynamic balancing is preferred, because static balancing won't take care of wobble. One telltale sign of dynamic balancing is wheel weights on both the inside and outside rim lips on at least one wheel.

Try torquing the wheels when the truck is on the ground: while the truck is on jacks, run down the lug nuts, then lower the truck to the ground and do the final torquing. This ensures the weight of the truck is resting on the center hub.

 

I just checked the wheels. only weights on one side. got them balanced at Just Tires. Really think its the balancing?

 

Yes, take the wheels to another shop for balancing. Insist on dynamic balancing, and be sure to tell them the wheels are intended to be hubcentric, so they don't mistakenly use the Haweka flange plate adapter on the balancing machine.