Review on JGRZF Bike Computer: Wireless Speedometer and Odometer with Backlight, Waterproof LCD Display – Ideal for Outdoor Cycling and Fitness (Wireless Computer) by Michael Herrera

This product seems to meet my expectations, especially in the fact that it is visible in the sun, the characters are large and it is easy to place it in a suitable place, it seems precise and the keys are not mechanical. Hopefully this means I can switch modes while driving without having to stabilize the back or sides of the device by pressing the mode button. I liked how easy it was to snap the display into the stand and remove it without fiddling with the flimsy plastic levers. It snaps into place with a bayonet catch. For everyday driving, I wanted to see speed, odometer, time, distance traveled and temperature at a glance. An altimeter function would be nice. I wasn't interested in anything like connecting to a phone app via Bluetooth, except maybe a message indicator or speaker. The device uses general calculations to display calories and fat burned. My intention in purchasing this device was not to mess around with the phone app. However, I had to read the tiny instructions a few times to figure out how to set it up, and it can be difficult to remember how many seconds each mode needs to be held down to make changes to it. The magnet and magnet pickup had to be adjusted because the magnet is a few millimeters longer when mounted on cross spokes. He cleaned the fork well, but there wasn't enough space between the two straps holding the pickup to clean it. This problem was solved with nail polish, which kept the bands further apart. I will test this device next week and update if necessary. At this point I think it's a solid four stars. Three month update: I still rate this device a solid four stars. It seems to provide accurate data, the screen is visible and easy to detach after a ride. But as expected, the programming is hard to remember; how many seconds which touch key has to be pressed for which function. I've tried several times to simply reset the odometer but I did a program reset and I had to go through all the settings and they may have been mixed up. I don't care about the maintenance schedule, but I know I've changed mph to kilometers per hour and may have changed the tire size as well. I seem to have installed it on Racer II as well and can't quite remember how to get it back on Racer I. An improved paging system could make this more intuitive. Regular drivers who don't use it every day need to create their own cheat sheet with notes to start working with the device. The cheat sheet should include the meaning of some cryptic display categories. Not easy to remember either. And it's not obvious which rows are editable on each display. Some drivers prefer being able to see their preferences at a glance rather than scrolling through screens while driving. Most of the issues I've encountered are mostly related to operational issues. I prefer the wired magnetic sensor because it's one less technical issue to worry about if something doesn't work, and the sensor is the main device that controls all the calculations. Just don't bother with the cable from the radio. Use zip ties to protect it from damage and make sure the pickup is positioned correctly to feel the magnet on the spokes so it doesn't slip when the front wheel spins. And I do want to reiterate that the zip ties hold the pickup to the struts, but due to the odd shape of some frames, it often helps to put a few drops of rubber glue, nail polish, or silicon sealant around these components to keep them in place. Of course, if you plan to use the bike on an indoor trainer, position the magnet and pickup on the spinning rear wheel with the wire going to the front of the bike. This may be a scenario where wireless is preferable.