235/85/r16 are about as tall and wide as a stock Roxor (0 lift, no spacers, sway bar connected) will handle AND allow for steer stops adjustment for a tighter radius than factory.
Any taller or wider will compromise turning radius.
I tried 235/85/r16 at the tire shop. Turned the wheels stop to stop. No issues.
(I decided for 255/85/r16 and installed 1.5" spacers and the add-a-leaf)