iTrakit: GPS bike tracker. Fits in frame. | Indiegogo
Hidden inside the bar, Sherlock wants to bring stolen bikes home - Bikerumor
Coban Quad Band Bicycle Gps/gsm/gprs Gps Tracker Gps305 Mini Hidden Gps Bike Tracker With Real Time Tracking By Register Mail - Gps Trackers - AliExpress
Miles: Your First GPS Bike Computer by Angel.Huang — Kickstarter
iTrakit: GPS bike tracker. Fits in frame. | Indiegogo
Hidden inside the bar, Sherlock wants to bring stolen bikes home - Bikerumor
Pod 3 - The customizable GPS tracker for everything by Pod Trackers — Kickstarter