These pictures were taken way back in 2021, but I never got around to writing this post. Now I will just publish this post so that the pictures will be uploaded to the blog.
Basically this system works by using a servo motor to pull the shifter cable by a fixed amount, actuating the rear derailleur. The servo motor is mounted at the chain stay area, and a short section of shifter inner cable links the servo motor to the rear derailleur.
When the wireless shifter is operated, it sends a signal to the servo motor to pull or release cable. The amount of cable pull or release can be set, as well as the number of gear steps. This allows this system to be retrofitted to nearly every mechanical rear derailleur in the market.
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