contact points= there is more than one way to skin the cat.You guys are too hip.Thanks great readin.Cheers

my contact point is my ibook
e-RICHIE©™®

How do we determine the optimum contact points? How do we even measure what we have? I feel I am close with my Strong and with my Merckx, which are set up to within MMs of each other.

Serious question.

BTW, trusting the builder is a big leap sometimes. Even though they surely know more than I do.

when your pants droop you get braces, right?
are you riding efficiently? does exercise induce
pain or injury? you will know best what is and
then you will ceased fidgeting with the "numbers".
if trusting a builder is a leap, why?
i trust airline pilots!
e-RICHIE©™®

[QUOTE=saab2000]How do we determine the optimum contact points? How do we even measure what we have? QUOTE]

here:

I am glad you trust the pilots! :banana:

Riding does not induce any pain and I have a flat back position. I feel it is efficient. I am a perfectionist and always think that pretty good is not good enough.

You can see my Merckx under "the slow merckx in question" in the custom gallery here. There you will see my position, or at least one which works for me, but no picture of me on it.

But even though the bars are low and the drop pretty great I almost feel like they could be lower. That is what I mean. How low is too low?

Maybe when I am back out east I will have to visit a builder and make the leap of faith. I was once measure by a pillar of American framebuilding, but got cold feet. My bad.

BTW, pilots tend to be control freaks. I am no exception..... a bad customer would say some...... :rolleyes:

Excuse me, but what is 'l' called and what is 'R' called?

I is called frame setback
R is called saddle nose setback
S is called financial setback
e-RICHIE©™®

Thanks. :)

BTW, I guess that various size cycles, including the excellent one by Serotta measure the contact points more than the lengths, though those are the numbers that end up being used.

I once used one and it seemed pretty cool. I guess that would be a way to let the customer work with the builder and get something right.

that's "half" of the it. creating a useable design
incorporating the static contact points is a builder
issue, not a fitter issue.
hey - thanks for reading.
e-RICHIE©™®

That is the way the process works. The fitter and the rider work to find the position of the three contact points, and Kelly does the rest. The numbers on the size cycle top tube, etc... are only for reference. They do not necessarily reflect the future frame measurements.

word.
i've seen size sheets where the fitter
spec-ed in the geometry too. checks
and balances are in place. kool.
e-RICHIE©™®

jaco played ..... kinda like Bird played a plastic sax it didn't matter what they played they were music ....i.m.h.o. e-RICHEY could use state of the art tools or old tools and still make a work of art it don't matter it's going to come out these are masters.Cheers

e-RICHIE,

I'm confused again. What relevance does the 'l' measurement have? Doesn't the rider's position relative to the bottom bracket also depend on how far the post is extended. If the post is extended farther, then the rider moves rearward, and if the post is shortened, the rider moves forward, yet 'l' would be the same in both cases. So, it seems to me if someone said my frame setback is X, that wouldn't tell you much about their position relative to the bottom bracket.