[Nexus]

I got my BC 1600 today. I want to put speed sensor in the front fender. There are 2 screws visible, and I was hoping that would do it. Turns out there is another screw inside the fender that I can't get to without removing the wheel. What is a good for mounting magnetic censor on front wheel? I'm lost. I really want all wires out of sight as much as possible.