What is the SRAM Braze-on Front Derailleur Clamp 34.9mm?

The SRAM Braze-on Front Derailleur Clamp 34.9mm converts a braze-on front derailleur to work on a round seat tube with a 34.9mm diameter. It includes a ChainSpotter Stop, a small tab that prevents a dropped chain from wedging between the front derailleur and the frame, protecting both components and making chain retrieval faster. An essential adapter for frames with round 34.9mm seat tubes running braze-on compatible front derailleurs.

Confirm your seat tube diameter is 34.9mm before ordering. For 31.8mm seat tubes, see the 31.8mm version.