She purchased the triathlon bundle so it also came with a quick disconnect for my bike. An extra quick disconnect kit from Garmin 910XT at my LBS is a reasonable $9.99. It took all of about 1 minute to install the quick disconnect on my stem. There are several sets of bands that come with the quick disconnect. I chose the larger set that will accommodate installation on the stem. The smaller bands are to mount on the handlebars. The bands fit snugly and there is NO play in the quick disconnect on the stem. The twisting motion to connect and disconnect the head unit does not cause the mount to move.
I lowered my stem a week ago to determine fi the lower position of the handlebars is a bit more comfortable for the longer rides. My hands rarely get numb so the added pressure on them should not be an issue. The Garmin 910XT sits nicely on the stem and is quite easy to remove and connect to the bike.
From the side you can really see that the mount and head unit are minimal. I like my handle bars to be clean and free of devices such as a phone.
The speed and cadence sensor also was easy to install. A couple of the supplied cable ties and it is attached to my frame. All adjustments were performed with simple tools such as a Phillips head screwdriver.
Included with the triathlon package for the Garmin 910XT was a Garmin GSC 10 Speed/Cadence Bike Sensor. The speed/cadence sensor came with one rubber mount attached and another rubber mount of a different size included. I did remove the original mount and place the smaller included rubber mount on the sensor. I loosely zip tied the sensor to my frame such that it could still be moved back and forth for fine tuning.
Summary: The install was simple and used basic tools. The instructions were clear and detailed. The screen is a bit small for the bike. I have 2 major screens I view while cycling. Screen 1 displays speed, heart rate and cadence which gives me insight into my training effort. Screen 2 displays elapsed time and distance which I use to determine nutrition intake, turn around points and general trip status.
I do feel the head unit of the watch is secure to the quick disconnect. I feel the only real way to accidentally disconnect the head unit from the quick disconnect is to run your hand or arm along the top of the unit and forcibly rotate the unit. Yes, that is a stretch and is not a concern while on the bike. I do however wonder that in the case of a crash it is entirely possible for the head unit to disconnect and do scattering across the pavement
The unit is not a touch screen but is easy to use while mounted to the bike. Cycling through data screens is a snap with the up and down buttons on the upper right side of the fhead unit. Starting and stopping the unit is another dedicated button on the right side of the face. The lap button is located on the face of the unit to the left. A word of caution: do not try to attempt to access the menu system and setting while actively riding the bike. You can remove the head unit to see it better but you will likely crash.
