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Retrofit kit for Roller Coaster on a Gen1 frame


This kit is a necessary add-on to install the Roller Coaster on Gen1 frame.


Frame compatibility: Gen1. See the picture to identify whether your frame is a Gen1 or Gen2. Heinzmann powered are always Gen1, Shimano are always Gen2, and Bafang powered can be either Gen1 or Gen2. New bikes are all Gen2.