Colnago C50 - Question on Wheels

Discuss light weight issues concerning road bikes & parts.
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1234SO
Posts: 40
Joined: Tue Jun 17, 2014 8:54 pm

by 1234SO

Hi all,

I bought a used Colnago C50 - the condition of the frame is pretty good. It also has the Colnago Star Carbon fork.

As a test, I tried to use my Bontrager wheels with DT Swiss 240 hubs. They do not fit - not in the front and not in the back (and because of the hub and not the tires).

Do older Colnagos have a different built-in dimension? I always thought that 100mm in the front is the standard for a long time? I know that the size for the back changed a few times in the past but I still expected the DT Swiss hubs to fit.

Thanks for your insights!
Mato

by Weenie


AJS914
Posts: 3397
Joined: Tue Jan 28, 2014 6:52 pm

by AJS914

How exactly do they not fit? The spacing on the C50 should be the current road QR standard 100/130mm.

1234SO
Posts: 40
Joined: Tue Jun 17, 2014 8:54 pm

by 1234SO

Thank you. I cannot hang it into the fork - the end part of the fork is too narrow for the end part of the hub (see the picture below, which shows the hub). It does not rotate. It is puzzling because the end part of the fork should not get narrower over time.

https://dycteyr72g97f.cloudfront.net/up ... HO_001.jpg

AJS914
Posts: 3397
Joined: Tue Jan 28, 2014 6:52 pm

by AJS914

Take some measurements or post some pictures for other to see.

My only guess is that someone pinched or squashed the dropouts on that C50. I have DT Swiss 350 wheels on a C40 right now. They fit without a problem. I've also fit wheels to many vintage frames without an issue.

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Calnago
Posts: 8425
Joined: Sun Nov 07, 2010 9:14 pm

by Calnago

They should fit without issue. Do the dropouts look bent or anything? I don’t think the carbon fork stays themselves would “bend” permanently being all carbon and all, but certainly the dropouts might have gotten tweaked a bit. Measure the distance between the dropouts. As you know and was said already, it should be 100mm front and 130mm rear.
Colnago C64 - The Naked Build; Colnago C60 - PR99; Trek Koppenberg - Where Emonda and Domane Meet;
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by Weenie


1234SO
Posts: 40
Joined: Tue Jun 17, 2014 8:54 pm

by 1234SO

Hi - so there was an issue with the drop outs (the distance, 100 and 130, was fine. We had to file the aluminium a bit; it works now w/o any issues. Will post a pic once the build is final.

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