Originally Posted by slowandsteady
It has everything to do with it if you are looking to have the relative stem angle at 0 degrees and your Steerer is at an angle as well. You have to factor this in to get the relative angle you are looking for.
True, but the OP was just complaining than some call is an 84 while others call it a 6. (S)he already understands that it is relative to the head tube angle.
I always figured the way they measured it changed when they went to threadless. I'm not positive, but I think all quill stems were original leballed by actual angles. It sounds weird to label a stem an 84/96, so they just called it 6 so you could decide +/-