Originally Posted by
ShinyBiker
105 degree rise?
0 degree is completely flat. 45% is midway point. 90% is perpendicular, 105 degree is coming back at you.
As I understand it, you subtract your headtube angle from the degree of rise listed by the stem manufacturer to get the actual angle of the stem above horizontal. So, I have a 105 degree (advertised) stem and a 73.5 degree headtube, which means the actual angle of the stem is 31.5 degrees above horiz.