An alignment gauge is essential for diagnosing and repairing bent or misaligned derailleur hangers, often the source of shifting problems.
Park Tool Valve Core Tool VC-1
Park Tool Cassette Lockring Tool FR-5.2
Park Tool CT-3.3 Professional Chain Tool
Park Tool I-Beam 3 Multi Tool IB-3
Park Tool Professional Tool Kit PK-5
Park Tool CT-5 Mini Chain Brute Chain Tool
