Interesting that it looks like only two of those cogs are well worn. Didn't this guy ever shift?I'll check it when it comes back in for the service appt but there isn't any stretch. A ton of wear, no stretch.
I imagine it isn't too good for stock cheapo wheels either.A lot of guys w/ electric bikes don't shift. That's what kills all the motors on the Specialized bikes. People shift to the 11 and figure since they have a motor why shift to easier cogs? The torque just ruins the motors.