Chainstay Speed Sensor

Chainstay Speed Sensor


When Shimano announced the EP8 system Shimano also introduced the EW-SS300 STEPS Chainstay Speed Sensor.

It is installed on the chainstay and utilises a spoke magnet (included) to determine the bike's speed. The distance between magnet and sensor should be 3 - 17mm. The unit comes with a special spacer in case the distance between magnet and sensor exceeds 17mm.

Affiliate Links

Using the affiliate links to purchase anything earns the site a small commission, at no additional cost to you.


The EW-SS300 sensor comes with a fixed length cable attached to it. There are four lengths available, so make sure you buy the one that fits your bike frame best:

  • 340 mm
  • 540 mm
  • 760 mm
  • 1400 mm

Just like the Disc speed sensor EW-SS301, this speed sensor will only work in a dedicated speed sensor port. The connector has a fin and will not fit any regular E-Tube ports


  • Model code: EW-SS300
  • Series: EP8 E-MTB (EP800)
  • Wire length: 340mm / 540mm / 760mm / 1400mm
  • Connector: SD300 (with tabs)

Related components

View the EP8 Drive Unit (DU-EP800)


EP8 Drive Unit

Manuals & other documents

More images