A forum for that very narrow topic? I sympathize but couldn't even get the mods to consider one on such a widely and commonly discussed item "Tires and Tire Pressure", even though there are many sub-forums that show up here that may be as narrow as that being requested by the OP. The mods seem very unwilling to start new sub-forums.
Ole and Anne Anderson, Highland, Michigan
'02 Adventurer 32V, Ford F-53, ours since 4/08,Goodyears, Konis, SeeLevel, CHF
'84 CJ-7 , 5.3 Chevy, 3" lift, 33's, Detroit Locker, Fiberglas tub, winch, hi-lift