Bike Forums - View Single Post - Tiagra FD clamp size

12-01-06, 10:22 AM

#5

Sheldon Brown

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Join Date: Jul 2002

Location: Newtonville, Massachusetts

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Quote:

Originally Posted by acape

Yesterday I removed my front derailer to swap it over to my new frame. I then found out that the clamp size was different. Previous bike was 34.9 seat tube, new one is 31.8. I decided to head to the LBS today for a new FD, but after doing some reading, I learn I may not have to.

The Tiagra came off a 2005 Lemond Reno. It sounds like it's just a braze-on derailer mounted to a clamp, so all I really might need is a new clamp. Is this correct?

Very likely. I don't think the Tiagra comes in a clamp-on 34.9. Suitable clamps are readily available for about US$12.

Sheldon "Clamp-On" Brown

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