I wrote to Kona on what the max pressure for the Sun MZ14 rims were. Here is their response:

Just follow the tire pressure noted on the sidewall and you’ll be fine. I’ve seen them run up to rock hard for commuting without a hitch.

If you really need to run high Psi all the time then go with a model that runs disc brakes. Rim brakes wear away the rim and cut grooves into it that will eventually fail. I’ve had tires run at under 50 Psi, and rims still disintegrated in a spectacular fashion.






I already have Disc brakes so this is not a problem for me.