I'm following this as I too havent bought a front for some time due to injury,, and it seams my choices of past are no more.. Same terrain as GMP,, we have ridden together several times.. The mx 31 how are the side knobs?? I have been running a 130 wide s-12 rear and I forget the # bridgestone front due to the predictability on grip while leaned over at excessive angles. Never liked the s or m 12 front.. and have been told I lean way over in the switchbacks.. This is the main reason no trials tire for me,, no side traction..