First was the air in the tires...you laugh, but 80#f/90r has its own issues...two inside flats, solved by Velox cloth rim tape, 19mm. Rolls on the center rib of the stock Kenda 2.3".
While we're on tires, next year will see Schwalbe Marathon Plus in 1.5 width. Btw, each width (2.0, 1.75, 1.5...