Originally Posted by not2blu
Why can't all the manufactures use the same reference point? It would be less confusing.
Why are there english and italian bottom brackets? to strip threads.
Most frames have a 73 degree head tube, which means that horizontal would be a 17 degree stem.
What's worse than manufacturers not agreeing on 10 degree/80 degree , 84 degree/6 degree is that some internet web sellers of stems (cough*PBK*cough) don't state the stem angles in the catalogs, just the length.
Regardless, you should not be picking a stem angle based on looks.