Bike Speedometer Waterproof Wireless Bicycle Bike Computer and Cycling Odometer with Automatic Wake-up Multi-Function LCD Backlight Display

A reasonable wireless computer. Setup is easy, readings are accurate. Probably should dock 1/2 star because handlebar-mounted headlight causes interference with the computer and it stops working when lights are on but I guess that's a minor complaint since most rides are during the day. I wouldn't say this has any advantages over a wired computer. In fact, wheel sensor is much bulkier than one from a wired computer. There's potential to flood the sensor if you go into really deep water, and there's one more battery that will need replacing but the price was right so why not? Update: had this on my bike during hurricane Harvey. Went through some very deep water and the sensor worked fine. Still works fine. This bike computer stands up to the elements well.

The price was right and it was delivered in just one day you cannot beat that

I'm very pleased with it. The first one arrived defective; as per Amazon online instructions I returned it via Kohl's and had a replacement on my doorstep the next morning. One think I was happy about was the mount. I didn't want to mount it on my handled bar but instead on the stem of the bike, which of course is perpendicular to the handlebars (please see photo). At first, I wondered if I would be able to do this as the computer mount appears to only curve so that it just be mounted on the handlebars, but happily I noticed that the bottom half of the mount can be flipped so that the computer could indeed change the mount's direction by removing a few screws flipping the curved part in a perpendicular direction, and putting the screws back in. After that, installation was a snap. Not every bicycle computer has a clock on it, this one does. I personally really like to easily know what time it is as I bicycle; for those like me, this computer has that capability. It did take some time to get used to which button to push to do what - see how many miles one had ridden (odometer), what the average speed is, flipping back so the clock displays, and so on, but it's actually pretty simple to do once you've ridden with it a few times. I found it to work the most accurately as far as speedometer and distance by measuring the circumference of my bicycle wheels using chaulk marks on the ground. Enter that measured circumference in into the bicycle computer's setup, and in my experience it was very accurate. The backlight is very bright and useful for viewing once it starts to get dark outside, and as you can see in the photo, the display is extremely easy to read.

Despite having the magnet and transmitter just a little more than 1/8 inch apart, any closer and they would hit each other, the odometer will work for about 2 minutes when walking the bike around, then shuts down once I get on to ride. Have checked it over the last 23 rides, battery and location, it just won't work while riding. Because I kept trying to get it to work, my return window shut about a week ago. Now I can't return it, very disappointed. I switched from a wired device that just wore out to the new wireless. I'll just hunt down another old fashion wired one or switch to a app on my phone. I did reach out to the seller about this and never heard back.

I am pretty handy but installing this bike computer drove me NUTS! The biggest pain is programming it. The instructions are not accurate/not complete/not clear. As a result, I had to start over about a dozen times until I figured how to press the right buttons in exactly the right sequence to progress from one setting to the next, in order to set the bike tire circumference, miles/KM, time, etc. Once you go too far, it will not let you go back—ever. The only way to start over is to remove the battery and replace it. That removes ALL the settings and concerns me because when it’s time to replace the battery, it means I will need to completely reprogram the thing. UGH!!! One setting is the tire circumference. That’s the measurement all the way around the outside of the tire. It tells you a handy way to do that by measuring between two marks on the floor. But you have to know the circumference in millimeters. They give you some whacked way to get that. But a much simpler way to do it is to use Google to convert the inches to millimeters. It instructs you to wave the magnet (the one that attaches to the tire spokes) across the sensor to confirm it’s working, and then to install the sensor to the front fork not more than 3 mm from the magnet on the spoke. But in order for it to register, the magnet (on the spokes) needs to be almost TOUCHING the sensor. It’s difficult to get it within literally a hair’s distance, without actually hitting every time the tire makes a rotation. Overall, this is a good price. But I think other reviewers are correct in that you get what you pay for. I’d much rather pay another $5 or so, and get a bike computer that is easier to program and easier to install—even though all I wanted was a basic speedometer and odometer. I write honest reviews to help others make informed purchases because I read reviews myself and appreciate how helpful they can be. I hope that my review helped you!

I must say, this thing is really cool! If you have the least little bit of mechanical inclination, it is easy to install, just like all of the other wireless bike speedometers. The vibration sensor turn on thing is awesome, and while it is not as easy to read as an analog speedometer, the numbers are big enough. The instructions are not great, but when you buy Chinese stuff on the cheap, that is exactly what you should expect. Actually, the instructions for use printed in this Amazon description are pretty good on their own. It took me a little while to figure out how to reset some of the recording parameters (top and the average speed was what I was most interested in), but the speedometer function is right there, and that is the most important thing. I figured out the rest of it pretty quickly. It is well worth the money, and produces no drag to your bicycle like a cable driven analog speedometer.

Great little unit, especially for the price. I now have three of them. All of them came batteries included and a spare battery for good measure. Just buy whichever happens to be the cheapest when you're browsing. The real cheaper ones use a different battery for the sensor. For some reason, the one I'm reviewing here has a thermometer, which I find useful, but the other ones (identical model number) don't have it. Must be used on front wheel as transmit distance is short (I assume to avoid getting mixed up with other nearby bikes, as there's no explicit pairing.) If you have spokeless wheels, fear not. You can use any magnet. I used little neodymium pill magnets I had lying around for carbon wheels. You could feasibly pry the pill magnet out of the spoke attachment thing yourself. You can glue, tape, or use velcro cable-tie tape to secure the magnet, and make sure the sensor is almost touching it as it passes. Setup of the unit is pretty simple if you've ever owned a digital watch. Easy to start from scratch if you really mess it up as there's not many items to set. You need to know your wheel circumference in mm. A quick google of your wheel and tyre size is your friend. Easier than measuring it by hand. (and just as accurate... I did both and it was spot-on).

It's pretty bad both in quality and performance, the only reason I am giving it 2 stars is I think it might be fine on an indoor bike. The sensor can not mount close enough to the wheel magnet on a suspension fork, and on a 29 inch bike the receiver and sensor must be mounted further apart than will allow a wireless connection. Furthermore the magnet spoke slots are parallel and not able to line up with crossed spokes, the magnet came loose on me and snapped when it caught on the fork mounted sensor while trying to get the sensor close enough to get a reading. The second the battery was installed in the computer it started registering input even before I put a batter in the sensor, so I don't know what kind of interference it was picking up, but I doubt it's accuracy even if everything else mounts and functions properly.