|A must-have tool for anyone servicing and maintaining high performance bicycles. Almost nothing will ruin fast and accurate shifting like a misaligned derailleur hanger. When you get a new frame or bike, check the hanger. When you're trying to fix rear shifting problems, check the hanger. When you're bored, check the hanger. The DAG-2 has a wide range of adjustability to fit almost any bike.
LickNotes: The DAG-2 threads in to the derailleur hanger and the alignment is checked visually at the end of the tool. The hanger is cold-set back into position with the handle. If you're not sure how to do it, ask for help!