I should update my previous answer. Although the Garmin puck on the back of my phone case has been fine, I've had two Garmin inserts in the bike mount fail in rapid succession from rough road rides. This may be the specific grade of plastic they were made of, or it may be an inherent limitation when dealing with an oversized (for Garmin) device. Not sure. In any case, I'm using a Quadlock now; because a Quadlock bike mount wouldn't work with my aerobars, I'm using a motorcycle mount, which comes with a ⅞" adapter ring. It sits pretty high, and I may try fabricating something so that it sits lower. But the mechanism so far seems to be solid.