A number of different human drive options are available, depending upon your requirement and usage
SRAM 11 Gear Chain Gears - Derailleur
This is the default configuration that comes at no extra cost for all versions of the MK3. The rear cassette has 11 sprockets from 11 to 42 tooth, providing a gear ratio of 380%. Gear shifting is handled via a grip shifter on the right handlebar.
Single front sprocket - torque sensor
The front black aluminium crank has a sprocket of 44 tooth, and has a built in chain protector. Pedal arm length is 170 mm. The bottom bracket has a built in torque sensor that measure the human power, which is also displayed on the center display. The human power is used to calculate the (configurable) motor power in the PAS mode.
Enviolo step less Auto or Manual gears
This option is available for the MK3-MID and the MK3-FWD versions. The automatic version will shift the gear automatically depending upon your speed, keeping your cadence constant. The gear ratio is 380%. Gear shifting (and candence setting for the Auto version) is via grip shifter on the right handlebar.
Shimano standard / SPD pedals
The standard pedals mounted have click pedal s (SPD type) on one side, and a standard pedal on the other side. It is advisable to use click pedals (and appropriate click shoes) when riding the trike. This is to avoid that your feet fall down and get stuck under the front front suspension while driving.
Rohloff Speedhub Manual 14 Gears
This option is available for the MK3-MID and the MK3-FWD versions. This high quality manual hub has 14 gears, and provides a gear ratio of 526%. Gear shifting is handled via a grip shifter on the right handlebar.
Chain encapsulated in PVC tubes
The “human drive chain” runs from front crank sprocket all the way to the rear gear system. The top “driving” part of the chain runs through the front suspension via an idler sprocket under the seat (and over the battery) to the rear sprocket. The “return” part of the chain runs under the battery box. The chain runs mostly inside a PVC tubes to protect against dirt and to protect the rider from the chain.