Bosch Speed Sensor Slim 615mm Compatible with Smart System for E-Bike & Bicycle

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Bosch Speed Sensor - 415mm, (Bosch eBike system 2)

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Bosch 6-Bolt Magnet for E-Bike Speed Sensor – Fits Disc Rotor Mount

Bosch Speed Sensor Drive Unit Slim 615mm for Smart E-Bike Systems & Performance

KMC ebike Chainring - 21T - Bosch Drive Gen. 2 Sprocket - Wide - 1/2" x 1/8"