Before working on your Optibike always turn off the main power switch located under the seat, unless directed otherwise for troubleshooting. There are 3 switch positions, the middle position is off.
For Models Including
800XLi, Helia, 850, 850R, 850XLi, M7, R8, R8HD, 1100R, and R11
Component Manufacturer Manuals
Hub and Derailer:
14 Speed Rohloff Speedhub: Service and Maintenance Manual
SRAM X9 Derailer: Service and Maintenance Manual