Shimano STEPS EW-SS302 Speed Sensor Unit - 760 mm
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Product Information
Full details
The Shimano STEPS EW-SS302 is designed for e-bike owners utilizing the EP800 drive unit who require precise speed measurement via a disc rotor lockring mount. This sensor is ideal for riders seeking reliable, factory-standard integration for their electric drivetrain, though it is important to note that the required magnet set is sold separately and must be acquired to complete the installation.
All features
| Model Part Number | EWSS302N760 |
|---|---|
| Brand | Shimano |
Extended Product Information
FAQs
Does this sensor include the necessary magnet?
No, the EW-SS302 unit does not include the magnet set. This must be purchased separately.
Is this sensor compatible with older Shimano STEPS motors?
No, this specific model (EW-SS302) is engineered for the DU-EP800 drive unit architecture.
Can I use a 760mm cable on a small frame?
Yes, however, you will need to carefully loop and secure the excess cable along the frame to prevent it from rubbing against the moving parts of the bike.
Do I need special tools to install this?
You will need standard bike tools to access the disc rotor lockring and potentially the drive unit cover, depending on your frame design.
What happens if the magnet is missing?
The system will be unable to detect wheel rotation, and the speed display will show zero, effectively disabling the assist function.
Troubleshooting
E-bike displays speed error code
Check the alignment between the sensor and the magnet on the disc rotor; ensure the gap is within the manufacturer's specified distance.
No speed data on the display
Inspect the cable connection at the DU-EP800 drive unit to ensure it is fully seated and that the wire has not been pinched or frayed.
Pros and Cons
Pros
- Precise compatibility with Shimano EP800 systems
- Durable construction for reliable outdoor performance
- Optimized cable length for clean routing on most frames
- Easy direct-plug installation
Cons
- Magnet set not included in the package
- Requires specific disc rotor lockring compatibility
- Limited to specific Shimano drive units
Setup, Compatibility & Care
Installation requires mounting the sensor to the chainstay area and connecting it to the designated port on the DU-EP800 drive unit. Because this unit attaches via the disc rotor lockring, ensure your specific rotor setup allows for the clearance required for the magnet attachment. Care should be taken to secure the 760mm cable using cable ties to prevent it from snagging on trail debris. Regularly inspect the sensor housing after muddy rides to ensure no grime interferes with the magnetic pulse detection. Avoid using high-pressure washers directly on the sensor unit to prevent water ingress into the electrical connection.