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professional mechanics fit numbers

Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

professional mechanics fit numbers

Old 01-02-16, 02:27 PM
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professional mechanics fit numbers

Can anyone help me understand what the terms STI and STI-mid bar (bolded below) mean in the context of Ryder Hesjedal's fit numbers below?

Critical measurements

Frame size: 58
Saddle: Team issue
Seat post: L25
Handlebar: Sha 40
Stem- 140-17
Cap/Spacer: L
Crank arm length: 180
Cleats (colour): blue
Saddle height 82.2
Setback: 9.2
Saddle incl.: -2
Under Bar-Mid Hub: 51.5
STI: 21
STI-Mid Bar: 63.3

Saddle-Mid Bar: 68.3

It was curious to see how Ryder's fit was articulated (presumably by his mechanic) near the end of this article:

Ryder Hesjedal's Trek Madone 9 Series - Gallery | Cyclingnews.com

Specifically what struck me was the less commonly cited "under bar-mid hub" measurement. I guess with the integrated bikes it may be the easiest way for a pro mechanic to repeat assemble these bikes. What I did not understand were the fit numbers regarding the STI terms. Any help?
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