Hello ww's,

I bought a pair of as new 38mm full carbon tubulars, with novatech ceramic hubs.
They are +- 200km old so pretty new. They are from 2010.
I know the seller in person.
The front wheel makes a strange noise like if it was rubbing somewhere.

What i did:
Opened the brakes and checked if in fact is what rubbing somewhe, it wasn't.
Changed the front wheel to another one i had at home to check if the noise is really coming from there: the noise is from the front wheel.
When the wheel spins free on the air, there is no sound. -> only when sitted on the bike
The front hub seems to be tightened, so no play.
I could tell, but not sure, that the noise is made when valve passes through the floor.

Options i considered:
1- the tubular is not well glued so when valve section hits the floornit touches the rim and makes the noise
2- some bearing problem that i cannot identify.

What do you think?

Thank you


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Not an expert but I have read a lot of advice on this. It can happen that the valve hole is not big enough and therefore the tubular tire does not seat properly at that area. Solution would be to remove tire, gently file around valve hole area and reglue the tire.

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dangerous curves ahead

Please before you'd ever get out the file......If it is a click, click with each revolution.....it's very likely because your valve stem is moving ever so slightly in the rim hole and knocking against the rim. Put a single wrap of electrical tape on the valve stem (before glueing)

sorry, what do you mean by "you'd ever get out the file"?

I am also convinced that is a valve problem. Either too small hole for the valve like bikerjulio says, or a too big hole as you suggest.
don't think it is a mechanical problem, due to the condition of the wheels.

Without having heard the sound, does the sound still if you free spin the wheel? If yes, maybe it's the valve but unlikely it's the tyre. If no, more likely the tyre.

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"Bite off more than you can chew, then chew like hell." Peter Brock.

as written above:

When the wheel spins free on the air, there is no sound. -> only when sitted on the bike

Could the bearing caps be rubbing?

About a year ago, I started getting a noise out of my front wheel that sounds like the wheels is rubbing against the brake. I checked and checked and no brake rub. Upon closer inspection, I figured the sound was coming from the hub.

I put a little oil onto the bearing caps and the noise stopped.

Thank you for the hints.
I decided to put some tape between hole and valve and the noise seem to be stoppoed.

Lets see if it come back...


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I had a similar problem with a Mavic CC80 front wheel. Eventually I solved the problem by turning the wheel round. I'm still not sure what the problem was/is but now I can't hear it so I'm happy (sort of).

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"Nothing compares to the simple pleasures of a bike ride," said John F. Kennedy, a man who had the pleasure of Marilyn Monroe.

Have you checked your QR skewers? I shipped my bike when I moved house and one of my skewers was bent ever so slightly in transit. Symptoms exactly as you describe. Roll them across a flat surface and you should notice if they are not straight.

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CAAD10 Di2

I had the same problem. My front tub was not stuck down at the valve stem. It had a sticky clicking sound. Drove me nuts. Ended taking the tub off and slowly filing away the valve hole. Problem solved. I'd do the rear wheel some day as well. Tires are Vittoria Corsa and the wheels are DA C35.

impressive detective work guys..

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Wiliers: Cento Uno; Cento SLR; Imperiale, Zero 7 (all Super Record 11sp naturally)

My tubular tyre is vittoria 320tpi, i ended up putting some plastic around the valve and tapped iy.

Problem solved.


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