I have a 2004 Dodge Ram 1500 SLT Quadcab 4x4 and 3 inch Supreme Suspension level. The stock tires are 275/60r20. I want to know the tallest tire I can put on it with a 1/2 wheel spacer and not rub. I will only go to a 285 in width max. Thanks guys! Post pictures if possible!

 

I would recommend against the shell spacers. If you have put the time and money. Why not get wheels with the correct back spacing and off set. With the lift you may fit 315/70/? Which is very close to a 35.