TOOPRE Derailleur Hanger Straightener

Restore perfect shifting performance with the TOOPRE Derailleur Hanger Straightener. This professional-grade tool is designed to measure and realign bent tail hooks that cause frustrating gear skipping. It features a robust stainless steel body that resists flexing, ensuring accurate readings and adjustments. The precision-threaded tip screws directly into the derailleur hanger for a secure and stable connection to your frame. A 360-degree rotating arm allows you to check the alignment distance against the wheel rim at multiple points. By comparing the gap between the gauge and the rim, you can instantly identify exactly where the hanger is bent. This adjustment is critical for modern high-speed drivetrains, where even slight misalignments affect shifting accuracy. The tool is compatible with a wide range of wheel sizes, fitting most mountain and road bikes (20″ to 29″). An ergonomic sliding handle provides the necessary leverage to bend the hanger back into position gently and precisely. Essential for diagnosing mysterious shifting issues, this tool saves you from unnecessary derailleur replacements.