Having recently bought a Di2 bike Shane has been looking into the little quirks and general Di2 weirdness – both the good and the bad. This time he investigates Di2 security and explains how someone else can use any Garmin head unit to change your synchro-shift settings any time they like.. and there’s nothing you can do about it. Other than disconnecting your EW-WU111/Wireless Unit of course.
While Shane makes it sound like riders will fall off their bikes and die, we think the real world implications of this issue are a bit less serious. Nonetheless it is a big security issue and we agree that Shimano should fix this.
Click the image below to view the video on Shane’s YouTube channel.