I found an awesome site. https://www.wheel-size.com/calc/?wheel1=255-70-16X7.0ET31 If I understand it correctly, there are many many sizes of tires I can put on my stock, extended cab, Sierra. Seems to be too many. Anyone know how big I can go, or how big have you gone? I'd rather not lift, but if I do (1 inch, 1.5 inch maybe). I don't want it to look ridiculous with 255/70/16. Lmk..need tires for winter. Thanks!! Also. 2wd.