Derailleurs

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Destroyed Derailleur/Bent Twisted Hanger – I Can Fix This!

I found a free Trek dumpster bike with a broken mangled derailleur. It was ripped in half! And the derailleur hanger was twisted around almost 45 degrees. The bike was trashed, but hey, it was free! I am guessing the derailleur hit something, and the cage was torn from the body. Maybe the cage got …Read more »

How Indexed Shifting Works On A Bike

I show and explain how indexed shifting works on a bicycle with the shifters and derailleur working together to move the chain to specific cogs on a freewheel/cassette. The bikes in the video have Shimano SIS (Shimano Index System) derailleurs, but indexing works the same on other brands of drivetrains such as Campagnolo and SRAM. …Read more »

Fixing Shimano Sora Rear Derailleur With Slipped Cage

I repair a Shimano Sora rear derailleur with a cage that slipped past it’s stop point. Originally I thought it was slipped P spring, but that wasn’t the case. I show how to disassemble and re-assemble the cage pivot.

How To Fix Derailleur Hanger With Stripped Threads

I show how to repair a stripped derailleur hanger using a “Dropout Saver” from Wheels Manufacturing. I also discuss several other possible methods for fixing a stripped derailleur hanger. I know people are going to ask where to get the dropout savers. I got them on Amazon. Here are links to them: Narrow Dropout Saver …Read more »

Sachs Huret DuoPar Eco Rear Derailleur Overhaul – Disassembly/Re-Assembly

I teardown, clean, lube, and rebuild a vintage Sachs Huret DuoPar Eco Rear Derailleur. I also installed new bearings into the guide pulley.