Ah, each rim has its own tension specification!
I guess in my ignorance I just thought any mountain bike rim could handle equal or more tension than a road wheel.
There is no good way for me to find out what the specific tension rating of this rim is since Kinlin doesn't have a website, or contacts for that matter.
As for the tensiometer, I may be able to find one, somewhere.
The rims are made of Niobium alloy, which (I think) is softer than most aluminum rims.
I guess the trade off is weight versus strength.
I will however own up to "simply trying to use components that are not up to the job for your particular riding style."
I guess next time I'll spend the extra cash on style specific parts. IE, trials / downhill rims.
I'll ride the wheel until it explodes.