i have Kenda K-Rad 26 X 2.3 tires with the sidewall indicating a max psi of 80.XSL_WiLL said:Depends on the tires.
My DMR Moto Diggers and Hookworms are recommended for a max of 65 PSI. I've gotten up to 100 in the Hookworms. For urban rides, I'll typically run around 80 or 90 PSI. It rolls a little nicer and makes it more difficult to pinch flat. For anything on the dirt, I'll run around 40 PSI so the tires leave a bigger footprint.