How much distance should there be between the bike light and the magnet? Mille Stech Jensen June 13, 2018 08:21 Updated You should strive to have a distance of approx. 1-3 mm between the bike light and the magnets. Related articles Is there any advantage of adding extra magnets to my CPH light? My CPH light does not flash? What side of the bike is the CPH bike light most suitable for? RL700 Series I bought a Hub Light for V- Brakes (SL100), but I have disc/roller brakes. Is it possible to upgrade my Hub Lights to fit disc/roller brakes? Comments 0 comments Article is closed for comments.