Originally Posted by
wphamilton
I've done it - I don't know that it helps in traffic (no reason that it wouldn't), but I think it was useful when another cyclist latches on behind me. Keep it simple, a small lever switch zip-tied to the brake cable and activating against the cable stop.
Ah the zip tie,perhaps the duct tape of the biking community.
As long as it doesn't stand out then it is a great idea.