Throwing more info to the mix, this chart at bottom, from mavic suggests a max of 6.35 bar for a 20c rim (Enve SES5.6), which is about 92psi.
I assume since you're quoting Enve as recommending 60psi, that you are about 150lbs.
It's a conundrum when a tire maker says minimum safe inflation is one thing (80psi), and the rim maker says the max for any weight rider (250lbs on Enve site) can only be 80psi.
