Hill performance depends on the weight of rider, gear, steepness of the hill, and many other factors. In hilly terrain, it is recommended that users always pedal to assist the bike in climbing up hills. On steep hills, you should never exceed 500 watts of power. This can be accomplished by setting the pedal assist level to “Level 1” or "Level 2" or by riding with the twist throttle only partially applied. While regulating the throttle, watch the watt meter on the display and ensure that you regulate the power output of the motor so that it stays below 500 watts on steep hills. Never ride up hills which exceed a 15 percent (%) slope with the motor fully engaged. If you want to ride up hills steeper than 15% slope, first set the pedal assist level to “level 0, level 1, or level 2” to avoid exceeding 500W of power to the motor.