product description:
ZTTO Bicycle Rear Derailleur Parts Hanger Extender Colorful
Designed for huge cassettes in different new size.
Designed for balancing the position of your road derailleur to run a wide-range mountain bike style cassette.
Converts road, gravel, or commuter drivetrain bike to decrease weight of a single front chainring.
Makes super steep climbs of double chainring bikes easy in lower gearing.
Dose not influence the shifting in the smaller cogs of the cassette but make the derailleur work as large as a 40T cassette.
Enables the derailleur to work with as large as a 40T cassette without compromising the shifting in the smaller cogs of the cassette.
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