It doesn't. The makers really specify what rims you should and shouldn't run. Each tire is constructed differently. Two tires of the same size may fit different rims due to their construction. There are guys running 295/70r17 on stock 17s. One of them was on a dirt road, pretty tame, and he blew the bead between the rim and tire. Next thing you know he's plowing into an embankment. Sure you can do it, but I wouldn't. And most places won't mount them due to the liability. Besides, that size is 1.25" shorter than stock. It's small. 305/50r20 is also small but at least in the ballpark. I have 305/55-R20 on 9" wide rims. They fit and work well. I only got these rims because it allowed me to go as wide as I wanted. I would have rather stuck with stock 18" or even 17" rims but I couldn't go wide with those.bosssho said:Yeah, I know that site...it is very good as far as helpful info, but where I am at is one site from Falken will say you can run a 295/50-20 on an 8" wide rim, but Hankook's site recommends an 8.5" wide rim for that tire...so I can't go to 1010.com to get help on that so I really need to appeal to you guys/girls to find out if someone is running this size tire or an ever bigger 305 tire on an OEM Titan or Armada 8" wide rim. I hope that all makes sense.