Well which 16" tire size are you in need of 305 or 349?
I just put some Greenspeed Scorchers 40-349 on my Tikit and they can be inflated up to 100psi. The Schwalbe Marathons [35-349] that I replaced can be inflated to 85psi
You could just call Urbane and I'm sure they'd be happy to answer your question.
Did you get the Kevlar belted version? If so, has it been holding up?
I had the non-belted version, which wasn't appropriate for NYC. But I'll be trying it with a liner soon.