Check the derailleur mounting bolt to see if it loosened up during your ride; maybe someone went out to lunch before they found the torque wrench. I wouldn't assume that the problem is you. Make sure that the hangar is straight when you put the new chain on just in case you had really bad luck and smacked a rock on your first ride. Enjoy your new bike!Rider error for sure, too low of a gear or what causes this?
Bike is a Specialized Turbo Levo.
Correct. This is most likely the problem. You're on turbo mode, climbing and shifting more than once.For sure, downshifting across multiple cogs under heavy load is going to be a problem for any drivetrain. I believe this is the reason SRAM now has special shifters that only allow downshifting by one cog at a time. You can't sweep the thumbshifter and jump multiple gears. For example, on the SRAM website describing the NX Eagle shifters, there is this bullet:
- Also available as a E-MTB specific Eagle™ shifter option limiting the pull lever to a single engagement.
BTW, one of the super-cool features of the Bosch motor system is that it automatically cuts power when it detects a shift. It works amazingly well.
I guess its a shifting problem due to the extraordinary amount of power the e-bikes delivers to the cranks, so that any shifting fault that would just make a noise under leg power only, may rip the chain apart.