Bosch CX motor gen?

BrentD

Well-known member
Jun 25, 2020
168
133
New Zealand
Turn the bike off. Then, holding down the + and - buttons on the Purion display, press the power on button and the display will scroll through all the firmware and hardware version numbers.
 

Zimmerframe

MUPPET
Subscriber
Jun 12, 2019
13,907
20,612
Brittany, France
Or if you just mean is it a Gen 2 or a Gen 4 (the ones used on Mountain bikes). Then visually the Gen 4 will have a normal sized chain ring and the gen2 will have a tiny chain ring...
 

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