Dunno, I just used black plastic truck air line for the rear light wire. Comes in a bunch of diameters. The smallest one looks about the same as brake or gear outer, so it runs alongside those in the same mounts. Mostly because I have to fully demolish the bike when I pack it for travel, so the cover stops the wire from getting damaged when I jamb stuff in the box. Could probably do the same for the front, zip tied on.