I have no experience with that truck, but looking here:
http://www.toyota.com/tundra/specs.html

275/65R18 was a factory option on the 4x2. 285/60R18 is just a little shorter and a little wider. I'd think they'd fit just fine.


'97 4Runner, '06 F350, '86 4Runner, '05 WR450
http://home.4x4wire.com/erik