Here in S E Michigan the roads are so bad I can't imagine trying to ride skinny rode bike tires !! I started out at 371 # on a cruiser 7 speed . Not to bad a ride considering the roads I have to deal with . Switched to a comfort bike with a front shock and 700x35 tires and its much better ! But ive lost a ton a weight . I run my tires at max + 5 pounds nary a problem . I am even running cheap tires price wise Kenda kouriers seem like awful good tires for the $$ but only a couple hundread miles on them so far . Max on my tires is 85 and I run them at 90 psi .