The SX1 and SX2 are medium-sized front and rear geared motors from Shengyi that we stock as a 'slightly bigger brother' to the Bafang G310/G311 motors. These also have helical cut gears for silent operation, but they run an outrunner motor with a single stage planetary gear reduction rather than an inrunner with doublestage planets. This makes them a bit larger and heavier than the G31X hubs, providing higher torque output before overheating and more robustness at fast RPM's without risk of magnet adhesive failure.
- Totally Silent Drive: The helical cut gear system of the SX1 and SX2 motors has the same "smooth as silk" feeling that you've gotten used to with the Bafang G3XX series or any direct drive hub motor.
- Freewheeling: The SX motors have a built in clutch so that they freewheel with no drag when unpowered, making them well suited for people who expect to ride frequently without any assistance.
- Easy Disassembly: The Shengyi motors come apart easily for service using T20 torx bits, and features an O ring seal on the side plate joint for consistent waterproofing.
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Medium Power Levels: This motor is ideal when you need a lightweight geared motor for somewhat higher power.
- Disk Compatibility: Both the SX1 (front) and SX2 (rear) motors have space for a 6 bolt disk rotor with correct rotor alignment on standard bike frames.
- Cassette Freehub: The SX2 motor uses a Shimano compatible cassette freehub body , allowing it to run on modern bicycle drivetrains with 9, 10, and even 11 speed Shimano mountain bike cassettes. (Note that 11 speed Shimano road cassettes are not compatible as they require a longer freehub body).
Kit Includes:
- Motor
- Motor Controller
- Torque Sensing 63mm Bottom Bracket, 4-hole crank, crank arms
- LCD Display
- Pedal Assist Controls
**Kit does not include batteries