iTrakit: GPS bike tracker. Fits in frame. | Indiegogo
Best GPS Bike Trackers and Smart Locks | 2018 Listings and Reviews
Thinvik AirTag Bike Mount for Hidden AirTag Under Headset Top Cap - Fit Headset Tube 31.8mm - Anti Theft - GPS Bike Tracker Accessories
Amazon.com: Airtag Bike Mount Bike Tracker Anti Theft – Bicycle GPS Tracker Anti Theft – Compatible with Apple Air Tag Locator Tag – Waterproof Holder – Security Screws 2 Sets – Rust Proof : Sports & Outdoors
The hidden GPS tracker that's also a cycle computer (video) | Cycling Weekly