firmer than what the guide says for me (works for me though--last thing I want in a race is a pinch flat).

For what it's worth, most MTB rims aren't rated above 50psi. If you follow the guide, you'll have a more comfortable ride, better traction, etc.

Happy to answer any questions--we have a ton of bikes and travel all over for bike races of all types (we have two current state champs, and two other state champ podium holders, in our household).