10 - 12 psi is what i run.the tires should be fine. sand about float not traction. and i never used deflators but it sounds good.i just pull the valve core and check it every couple of second when i think it is getting close,then when it get to around 15 -18 psi i put the core in and finish deflating. good idea to have extra cores and a compresser, i never lost a core but that would wreck your day
