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  #1  
Old 08-27-2013, 07:43 PM
Louis Louis is offline
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Colnago "Freuler" Geometry ???

It certainly has me confused. Let's say for "normal" off-the-shelf geometry I ride ST=60 c-c, TT=58.5 c-c, horizontal TT. For custom, say ST=61 c-c, same TT (i.e. longish legs, shortish torso), and I don't have a huge saddle-to-bar drop.

So, when I look at the Colnago geometry it looks funky to me, and if I just want a "basic" 60c-c bike it's not obvious what my choice would be.

Anyone care to explain what's going on, and what Freuler Geometry is intended to achieve?

TIA

PS, these images were lifted from a 2001 Colnago catalog. I'm not sure how much they've changed over time.
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  #2  
Old 08-27-2013, 08:13 PM
merckx merckx is offline
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A 62 would be in your wheelhouse, no? Colnagos are measured to the top. The rest of the hocus-pocus is just salad.
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  #3  
Old 08-27-2013, 08:36 PM
Louis Louis is offline
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Quote:
Originally Posted by merckx View Post
A 62 would be in your wheelhouse, no? Colnagos are measured to the top. The rest of the hocus-pocus is just salad.
One thing that confuses me is that "D" (c-c) stops growing, but as best I can tell, these all have horizontal top tubes. Is that last statement right or wrong?
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Old 08-27-2013, 08:52 PM
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Grant McLean Grant McLean is offline
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Quote:
Originally Posted by Louis View Post

Anyone care to explain what's going on, and what Freuler Geometry is intended to achieve?

What is going on is that the Freuler bikes have lower top tube,
so the head tube and seat tube extend past the normal intersection
of the tubes. The actual seat tube and head tube length are listed
in the chart. The center to center seat tube dimension indicates
where the actual intersection of the top tube/seat tube happens

On that geo chart, there is no "normal" size 60. Every size over
the 59 has a dropped top tube.

The intent is to make the size of the front triangle smaller on the
biggest size bikes. I suppose they feel it adds some rigidity to the
larger frames.

-g

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Old 08-27-2013, 08:52 PM
merckx merckx is offline
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D stops growing but H & A don't. D doesn't like to eat his vegetables, but H & A always finish the salad on their plates.

I see that Grant beat me to the explanation.
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Old 08-27-2013, 08:57 PM
Louis Louis is offline
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OK - I got it now, and it all makes sense.

Thanks guys.
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  #7  
Old 08-27-2013, 09:03 PM
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Grant McLean Grant McLean is offline
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Quote:
Originally Posted by Louis View Post
OK - I got it now, and it all makes sense.
That's how is works, i'm not so sure it really makes sense!

Today with longer seat posts, it's no longer necessary to extend the
seat lug above the top tube. So you'd basically end up with what
Pegoretti does, longer head tube on an otherwise shorter seat tube
main triangle.
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  #8  
Old 08-27-2013, 11:05 PM
buldogge buldogge is offline
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The only question I have is...



Why are you looking at Colnagos when you haven't even built that Kirk up yet???!!!

-Mark in St. Louis
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  #9  
Old 08-27-2013, 11:08 PM
Louis Louis is offline
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Originally Posted by buldogge View Post
The only question I have is...

Why are you looking at Colnagos when you haven't even built that Kirk up yet???!!!
Nothing in the works right now, just preparing for the future...
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  #10  
Old 08-28-2013, 12:22 AM
dave thompson dave thompson is offline
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Quote:
Originally Posted by buldogge View Post
The only question I have is...



Why are you looking at Colnagos when you haven't even built that Kirk up yet???!!!

-Mark in St. Louis
Mark, Louis is hoarding bike frames in anticipation of the zombie invasion. Or Armageddon, whichever occurs first. He'll be able to see what's happening then build the correct frame for the occasion.

I'm probably not welcome in St. Louis after saying that!
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Old 08-28-2013, 12:39 AM
Louis Louis is offline
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Originally Posted by dave thompson View Post
Mark, Louis is hoarding bike frames in anticipation of the zombie invasion. Or Armageddon, whichever occurs first. He'll be able to see what's happening then build the correct frame for the occasion.
Hmmmm, does anyone know anything about Moonlander geometry???

Dave, there's still plenty of room at the nearby state park for your RV:

Babler State Park
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  #12  
Old 08-28-2013, 12:51 AM
dave thompson dave thompson is offline
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Quote:
Originally Posted by Louis View Post
Hmmmm, does anyone know anything about Moonlander geometry???

Dave, there's still plenty of room at the nearby state park for your RV:
Nope, no parks for me. I'm going to park my bus in your side yard and hook up to your water and power. Then Mark and I are going to duct tape you to a tree and build all your bikes while you watch, helplessly.
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  #13  
Old 08-28-2013, 08:54 AM
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wallymann wallymann is offline
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yep, these guys nailed it

just focus on your preferred top-tube length for fit, everything else takes care of itself.

fwiw...pegoretti uses the same philosophy on many of his bikes, so it has the blessing of respected builders from a younger generation than ernesto!


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Last edited by wallymann; 08-28-2013 at 09:00 AM.
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