06 yukon help

[06XLYukon]

i got a chance to get some 20inch wheels cheap and was gonna put some sort of all terrains on them, well my question is what the biggest tire i could put on with out alot of issues and could i just turn the torsion bars to raise the front some or should i buy a kit, i found a kit on ebay for 135 its new keys and spacer for rear its 2-3 inchs n front and 3/4's in rear, but im new to all this so any input would be great thanks

 

[blueflamed03]

welcome to the site...I think a 305/50/20 will fit....no issues. Now that's stock height, lift you may be able to go bigger.