Product Description Guidelines for Replacing E-bike Components:Before you replace components on your e-bike, please read through the guidelines for component replacement for CE-marked e-bikes/pedelecs with pedal assistance. Compatibility:Hope brake rotors with 6-bolt mountat least 4.5 mm clearance between brake rotor and frameFeatures:magnet for attaching to 6-bolt brake rotors for speed measurement on e-bikesonly 3.5 mm thickcan also be used with floating rotorssuitable bolts included in the scope of deliverySize Guide:The size indicates the radius from the centre of the axle to the position of the speed sensor on the frame. The deviation between the measured value and the size of the sensor should not be more than 2 mm. Manufacturer Numbers:24 mm:HBSP44032 mm:HBSP437Contents:1 x 2 x bolts Manufacturer: Hope Mill Calf Hall Road Barnoldswick Lancashire BB18 5PX United Kingdom info@hopetech.com Distributor: bc GmbH Carlo-Schmid-Straße 12 52146 Würselen Germany info@bike-components.de