As far as charts, some tire manufactures like Falken will give u a chart that tells u the diameter of ur tire and acceptable rim width. That tire is a 33x11 16". 305/60R18 is a nice size tire 33x12.5 18". Same diameter just a little wider. most of the 18" wheels out there for ur truck in 18" come in 9" widths. Just do a search for 18x9 6X5.5 with a 0 or -12 offset. There's lots of combo deals on the web.