Hangers are unique to your frame and it is a good idea to buy a spare when you buy a new frame.
New derailleur cable.
Mount new derailleur before installing the new derailleur make sure the current derailleur hanger is in good shape.
Friction along the shift cable prevents consistent movement of the derailleur as the cable is pulled and released at the shifter.
If the derailleur hanger is damaged the new derailleur will never shift like it should.
We ll show you how to perform cable replacement using a shimano equipped road bike.
You don t have to be a mechanic to replace the rear derailleur cable.
Dirt and grit can work their way inside the housing.
The derailleur hanger is a piece of aluminum bolted to your frame that your derailleur is then mounted on.
On most derailleurs when the shift lever pulls on the cable the derailleur moves up the cassette to a lower gear.
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Shimano s low normal derailleurs on which it does the opposite.
The cable system is a common place to find issues that cause poor shifting.
In brief shimano sram and campagnolo all use different cable pull ratios the amount that a derailleur moves for every millimetre of cable pulled through by the shifter and mixing parts will.
If you are replacing an old cable and you re sure the cable was the right length and you don t plan to move the position of the controls or the handlebars you can match the new cable to old.