Problem Solvers Braze-on Front Derailer Adapter Clamp

These adapters clamp on to the seat tube so you can use your braze-on derailleur on a conventional frame. Available in three common seat tube sizes with 20mm of vertical adjustability.

Good for any round seat tube of the right diameter (please measure) and all braze-on type front derailers (AKA the ones without their own band). Not for so-called direct-mount front derailers.