Abbey Bike Tools Hanger Alignment Tool

No, it does not. This tool is designed for quick, diagnostic checks to see if your hanger is obviously bent, but it lacks the precision required for the actual bending or straightening process that a full alignment gauge provides.

Not at all. That is the primary benefit of this tool; it is designed to press onto the largest cog while the derailleur is still installed, allowing for a fast, non-invasive check before you head out.

Once pressed onto the largest cog, the tool hangs down to create a visual reference plane. You simply look to see if the derailleur cage is parallel to that plane; if it is visibly skewed, you know your hanger needs a more thorough adjustment.

It is designed to work with most standard derailleur hangers. However, because it relies on the largest cog for reference, it may not be compatible with extremely unique or non-standard drivetrain setups.

While professional mechanics will still rely on precision alignment gauges for repairs, this tool is excellent for a quick 'triage' check on the shop floor or for a cyclist's home kit to catch issues before they become ride-ending problems.