:help: We just bought an '07 Dodge Ram 1500 QC Big Horn Edition with upgraded 22" tires. From what I've been reading this isn't good as far as "rubbing" is concerned. I am interested in downsizing the tires and wanted to know if anyone has any input as to what the ideal size should be, 20" is the stock for the Big Horn but we had considered the 17". Any input? Is there any benefit to having the bigger tires (mpg, etc...)? We are planning to tow a trailer (not extremely heavy) and possibly a boat down the line.