ive been so confused when looking up stem and their rise/drop angles. here are 3 different companies with their stem:

Cinelli pista: 65 degrees
http://www.ribblecycles.co.uk/sp/roa...em/CINEHBSK200

Velo Orange: 17 degrees
http://www.velo-orange.com/votast1.html

Dimension: listed as 125 degrees but in description says 35 degrees rise
http://www.amazon.com/Dimension-26-0...5168937&sr=8-3

how do they measure the degrees?