• For rear derailleur extension, suitable for a mountain/road bike
• Flywheel speed expansion changes more smoothly, cyclist excellent accessory
• Provide bright color, to make your mountain bike more personalized
• Aluminum alloy material, sturdy and durable, long service life

Specifications:

• Material: Aluminum alloy 
• Weight: 12g/Piece

Notes:

• As shown in the measured data, a 6mm wrench is required to install the screws of the extender.
• Most rear derailleurs are compatible, but some rear derailleurs need to be modified by yourself!
• This extender is used to lengthen the rear derailleur, mainly used in modifying the enlarged style flywheel, which required a strong professionality, if you do not understand, it is recommended to consult first!