Yep the Titan or the Monster Pirate Tyres are a much harder rubber compound, so will run fine out doors, BUT they are heavy and hard on driveline. My old Dominator ran 8mm cvd's on all 4 and I still used to chew bones with them. My favourite wider tyres of all time, yet still heavy are the IMEX Jumbomaxx sized Chevrons and Swamp Dawgs. They are hard to get these days tho which is a shame.

IMEX Jumbomaxx Chevrons:



IMEX Jumbomaxx Swamp Dawgs: