Shimano STEPS RT-EM600-M Disc Brake Rotor with Integrated Speed Sensor Magnet - 180mm, Center Lock | Tree Fort Bikes
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Amazon.com : Shimano Steps EW-SS301 Speed Sensor Unit, for disc Rotor, Cable Length 1400 mm : Sports & Outdoors
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Shimano STEPS RT-EM800 Disc Brake Rotor for E-Bike Speed Sensor System - Golden Bear Bike Shop - Broomfield, CO & Elkhart, IN
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