you want at least 35" tires aired down to around 20 psi on the trails cuz of rocks
can go lower psi as needed for traction
these 31's leave a lot to be desired
bfg t/a's get good traction and break loose e z wen needed
but can be deadly on a dirt road with marbles at speed
skate around like melanie without her skate key...
'oh I got a brand new pair of rollerskates, you got a brand new key...'
you should get larger tires, dOOd
you need more ground clearance, there...
:D

:o

<_<