You’d better use the correct clamp when using it on your frame. Using the wrong size or a clamp suitable for the wrong material can damage your valuable frame permanently. Especially carbon frames are really delicate. The BBB BSP-90 ShiftFix is an aluminum clamp designed to mount a braze-on front derailleur to a frame that lacks the braze-on bracket. It allows you to attach your front derailleur at the desired height on your frame. Key Features Compatibility: Available in sizes to fit frame tube diameters of 31.8 mm and 34.9 mm. Function: Converts a braze-on front derailleur to a band-on type. Weight: Approximately 25 grams for the 31.8 mm size and 27 grams for the 34.9 mm size. Material: Made of aluminum.
