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PostPosted: Fri Sep 27, 2013 8:44 pm 
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Joined: Tue Jul 27, 2010 8:31 pm
Posts: 945
Colonia wrote:
Can we put this myth to bed? Italian stage-race geo is described in detail in the CONI manual, and that geometry is largely unchanged on today's Italian bikes. The long and low thing is bollocks. For example, a 56 cm Colnago should run a 9.5-10 cm stem based solely on frame proportionality (body morphology can dictate otherwise, of course). You can also see how this works just by looking at a bike: look at where the end of the bar (curve) ends up in relation to the front hub -- with a proportional stem, it will sit right over the hub.


Just as an aside, I run a 52s with a 100mm stem right now.

I would say it works really well but there is a proviso. As a combination it feels rock solid but the front centre on a C59 is considerably longer than on many modern alternatives from the likes of Cannondale, Specialized, Cervelo and others.

This will simply mean enhanced stability for many, and indeed this is what I find for the majority of riding. Attacking hairpins however, on a long alpine descent for instance, one is aware of a tendency to understeer when holding your normal descending position. Just my experience but the longer front centre requires a shift in body weight towards the front wheel when cornering sharply and this can be counterintuitive.

I suspect that a 50s with a 110mm stem would solve the issue when descending but I do wonder how much of the stability one might lose when climbing or riding low on the hoods.

Overall though, the experience of riding a C59 makes me aware of the failings that have been in all of my other bikes to date, regardless of numerous professional fits.


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PostPosted: Tue Oct 22, 2013 11:22 pm 
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Joined: Fri Aug 23, 2013 5:12 pm
Posts: 5
Location: NYC
Dear Colnago aficonados,

Long time lurker and soon-to-be Colnago C-59 owner here.

I am torn between picking 52 traditional with only 120mm seat post shown and going with 48 sloping that shows 160mm of seat post. I really want the horizontal look, but fear that a 115-120mm seat post might look... too jarring. 120mm of seat post also precludes a few pain schemes, such as the Art Decor White (ADWH)/Orange(ADAR) from last year which need at least 160mm of clearance for the whole flame graphic to show.

Do you think 115-120mm too short? If it were you, would you value a particular top tube look, horizontal in my case, more than the integrity of another part, that of a properly exposed seat post, for example?

Thank you!

Below is chart of 48s mocked up by my LBS and also showing how 52t would look.

Image

* I added 5mm to seat post height to account for a 170mm crank arm as opposed to 175mm that the chart is using.

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Colnago C-59 AD10 (WIP)


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PostPosted: Tue Oct 22, 2013 11:35 pm 
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Joined: Thu Jun 28, 2012 10:52 pm
Posts: 131
Location: Brisbane
I went for sloping whilst I already have 105mm saddle to bars drop, my thinking being that for small bikes sloping toptube looks best.
If you're flexible, slam the stem (with lower stack headset cap). You could also try 165mm cranks; it might improve your pedalling.

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PostPosted: Wed Oct 23, 2013 12:06 am 
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Joined: Sat Jun 19, 2010 8:21 pm
Posts: 413
Location: Zürich, Switzerland
IMO traditional and -17° stem looks best on a Colnago

See my signature, I have a thread there were I am selling a 52cm C40 so you can see how it would look like yours

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Colnagos : C50 ST01 - Master 30th AD10 - C40 Mapei WC


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PostPosted: Wed Oct 23, 2013 7:59 am 
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Joined: Sun Jun 18, 2006 10:29 am
Posts: 3127
Location: Athens, Greece
+100 on traditional

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