I'm a 17s guy, I like the bigger tires on as small a rim as you can put on the truck. I haven't bought rims yet for my current truck, but I had an 05 Hemi that had the factory 20"s on it and I dropped them down to 17"s as soon as I could afford it
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2007 Dodge Ram 5.9 2500 QCLB 4X4
305/65R17 Mickey Thompson ATZs, SRT Hood, Pacer Clear LED Cablights, Smarty Tuned, AFE Stage II CAI, AFE Deep Transmission Pan, Amsoil 15W40 in the crankcase, Muffler MIA, Turbo-Silencer MIA, Autometer Phantom Pyro, Boost, and Trans Gauges in Pillar, Black MBRP 5" Exhaust Tip, Low-Pro Tool Box in Bed, Mostly Debadged, Big A$$ Rear Bumper
198? K20 SCLB