Does the position of the reed switch matter?
The magnet supplied is a powerful neodymium 6mm dia x 4mm high button (or 5 x 4mm depending on the bike model) Many bikes have M8 allen head brake disc fixing bolts, and the ideal is to fit the magnet into the bolt head. The magnet will stay in the bolt head without need for any form of glue To remove the magnet from the bolt head, use a magnetized screwdriver or another magnet If your bike does not have M8 allen disc fixing bolts: If it has M6 allen bolts (and you did not specify which bike you have at the time of ordering), PRO-OILER will post you a smaller 5x4mm magnet free of charge If it uses conventional hexagon set-bolts, consider swapping one of the bolts for an allen disc mounting bolt. There is no technical problem with this, however… Make sure there is enough clearance – allen bolts usually have taller heads! Otherwise, glue the magnet to an aluminium bracket fixed by a disc bolt Do not glue the magnet directly to the brake rotor! There is no glue in existence that can wit
