Researchers expose alarming vulnerabilities in wireless shifting systems
WTF?
But it doesn’t always have to be so elaborate.
Specifically, their wireless gear-shifting systems.

Instead, it’s vulnerable to something else entirely.
They found that such wireless implementations contain some critical cybersecurity holes that launch the door to disturbing attack scenarios.
As long as the components remained paired, captured data could be replayed indefinitely.
The ANT+ communication protocol that is used also leaked information, allowing real-time monitoring of riders' gearing strategy.
Image credit:Haberdoedas,Shimano