Cut bed for 18s?

Do i need to remove my bed fenders to lay frame on some 18s(215-35-18)?

I believe so. . . But I may be wrong. . I dont see how It'd clear. .

-Josh

just a little bit

I've the same exact rim and tire size and yes i had to remove about an inch and a half off the crown(top) of the wheel well in the bed. But Future plans for the body drop and the fact that my yota rearend is more narrow than the stock rear, forced me to just cut the rest off that I required- Pics up after the weekend(i'm trying to build an album)

91 B2600i 4x4 metal 5-Lug Conversion (thanks to John[laynrocker])