Yes, the new SRAM Eagle 90 Mechanical Transmission was pretty much exactly the mountain bike drivetrain I needed: simple, ...
SRAM Transmission is no longer electronic-only. The new mechanical Eagle 90 & 70 versions might even shift faster!
Generally this uses a derailleur, which forms part of the gear switching and chain ... This is where an electronic shifter should be able to provide faster, more reliable and quieter shifting ...
To aid in this task, [Jan Oelbrandt] created Shift4Me, an open-source Arduino powered electronic shifter ... there is no shortage of bicycle-related hacks. Some of the more recent ones we ...