Dan has a good explanation http://www.slowtwitch.com/...#Anchor-SADDLE-35882

In Dan's article, "Proper Bike Fit for Triathletes, April.03": he mentioned "I also think that for steep seat-angled tri bike riding the saddle ought to be slightly higher than for road riding. " which is differnet to a publication I read from PKRacing.com: Going Aero, which mentioned that "Generally a triathlon bike saddle should be slightly lower that a road bike saddle, about 3 to 5mm, to conpensate for the pelvic rotation while raises the hip joint"

Gets confusing.

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*You're no good to me dead*

             "Gets confusing. "


Seems to me I read somewhere that if you have a road geometry bike and are moving the seat forward (forward post, etc) then the seat should be moved up. I believe this author claimed move the seat up 1 cm for every two cm's forward. Same ratio, only in reverse, when moving the seat back into a "big slam" position. However, if you have a tri geometry bike then your seat should be slightly lower than your road position.

Don't ask me the logic behind this. It's just something somebody wrote.

cerveloguy, can you explain the logic behind your statement?

No offense to "bike fitters" charging $150 to age groupers and promising to take minutes of their 40k TT, but I think you should beware of anyone telling you that any measurement on your bike should be a certain way. Just look at the different riding position of the top Kona racers. The only thing in common between Zack and Macca on the bike is that they both look effortless doing 100rpm and 25mph. There is an objectively measurable way to be more aero but aero gains are useless if you can't walk after a 45min ride. Once you can ride your bike comfortably for 3 or 4 hours then you can tweak for aero and power but not to move your comfortable position to a position dictated by some formula or theory!