so i have a 2006 4x4 dodge hemi quad cab, with 20's, and im planing on getting a 6 inch suspension lift. my question is what would be the biggest size tire i could go? thanks..

 

most 6 in suspension lifts for the 06-08 1500's say you can run a 35-36" tire, however you can run a 37x12.5 without any issues with most "TRUE" 6 in suspension lifts with the right wheel backspacing. A few people have already done it and had no issues.