Ask a Mechanic: Adjusting Shimano Derailleur Clutch Tension Ask a Mechanic: Adjusting Shimano Derailleur Clutch Tension Greg O'Keeffe2015-12-16T12:11:32-08:00 Brett wants to know: “ The clutch mechanism on my Shimano derailleur doesn't seem Ask a Mechanic: Adjusting Shimano Derailleur Clutch TensionGreg O'Keeffe2015-12-16T12:11:32-08:00