Colnago Carbitubo Monotubo Mapei GB decor

I picked this up last week…

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it’s a very rare piece, carbon tubes,

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set into aluminum lugs, the headtube is stamped Colnago,

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just like the Colnago Dual and Carbitubo..

Carbitubo_Front_1_4083_framed_red

colnago_carbitubo

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the decor is Mapei GB, which I managed to pretty much confirm thanks to fellow forum members at the venerable Velocipede Salon site,(thanks again!),

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so I’ll use this Dura Ace 7410 group …

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and I changed the rims for silver ones..

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the Dual , Carbitubo and this are all made by ALAN for Colnago,

you can see this shares the seat post lug with an Alan Record

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they also share top tube cable guides, and one on this is damaged, so the Alan chivalrously donated one…

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I just need to get a headset , and this one’s finished build wise, I still would like to find out what model, a Carbunitubo?

Here’s a mock-up to give perspective..

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now the frame has been compared to the Alan Carbonio, but you can see the top tube cable guides on the Alan are in a different place..

Alan 1 Compressed

and here’s a Colnago Dual cycloross, with a headtube stamp in the same location..

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so I’d say we can assume it is a Colnago, made by Alan.

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Further investigation has been fruitful, here is a Colnago Carbitubo

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with two downtubes…

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and the Colnago head tube stamp..

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and here is a frame set in the same decor, but with one downtube..

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$_5yyyy7

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