mouse007
Explorer
That's what I'm doing now. I was running KM2s in the 255 size on stock 16x7 TRD wheels. I didn't want to wear them out just driving to work so I put some 285 Nitto Terra Grapplers on FJ trail teams wheels and keep the KM2s in the garage. I'm definitely going to try the Nittos in the mud though. If they work well enough I may just sell the KM2s. I've heard good things about the Trail Grappler and its sister tire the Toyo A/T so here's hoping.
The Nitto Trail Grappler is an amazing tire. I had them on my FZJ-80 and on My discovery II. I never wheeled the Disco II so don't know how she would have done. The FZJ-80 did excellent on them. Open diff rig so a bit of wheel spin an low air pressure helped in slippery sections.