Steepness

Or did I misinterpret your question?  Sometimes my brain doesn’t process correctly  the weird stuff people say on this forum. You’re actually asking how much of a grade you can pull before the front tires come off the ground??

Im asking only because of how impractical it is to have a TC on a jacked up truck and how it’s much more apt to lay down and take a nap on its side compared to popping a wheelie!