one of my friends rides Valkarie and has always run a car tire, its the weight of the bike, it wears a bike tire out to fast. almost all boss hoss bikes run car tires also for that reason. and like Yota said bad runs thru the Ga mtns just fine (well untill this yr anyway) if i am not mistaken, i believe they run a lower pressure and with a steel radial it will flex andf give traction when in the lean. our bike dont weigh enough to try it but R-3's and Valk's and Hoss's they are so dang heavey that you just cant keep bike tires on them for very long, think about how many miles our bikes have when they are due and then think about how fast that same tire must wear out under a 900lb or more bike. i have ridden his Valk and although there are no twisties around here it go's around corners just fine.
