What tire pressures are people running off road. I did my first fire road ride it was excellent.. but dam.. the little stutter\chatter bumps suck.. I know I will be lowering the pressure.. my dirt bikes run 12 to 15 psi depending on dirt.. but this bike is way heavier.. so thinking 20 maybe 25.. and if I do drop my pressure.. is there a way to change the tpms?