The Hope E-Bike Speed Sensor 6 Bolt R24 are for 6 bolt rotors, standard or floating.Hope E-Bike Speed Sensor 6 Bolt R24 FeaturesCompatible with all Hope Technology 6 Bolt rotors.R24 sensor designed for bikes with a magnet 24mm from axle centre pointSensor is 3.5mm thick and requires 4.5mm clearance.
Best Price: £12.50 from Leisure Lakes Bikes