Garmin Speed Sensor 2

I am still confused about this unit and it's function. When all the head units came out tracking distance and speed via GPS, plus showing a pretty accurate map of where I went, I just had to have one. It was explained to me by other riders that I needed to use a speed season as well as it kept the speed data consistent but since using a Garmin head unit and speed sensor combo, I have had nothing but sporadic speed reporting at various times of my rides, been doing it for YEARS, not just recent. The speeds always seemed to be ok but got very erratic at the end of my rides. Since the use of a smart trainer, I have moved the speed sensor to the back wheel but this issue is still there. Have been in contact with Garmin, still am, and it was explained to me that once the speed sensor is paired, GPS speed is no longer used, AT ALL. all of this happens with the old Any sensors and the new and and BY sensors. Hate to say it, but I have resorted to a wired computer and just use the Garmin to get the ride map and data but basically ignore the Garmin speed. That being said does not bode well for any of th he sensors and head units out there. I just can not believe in this day and how long these devices have been out that they cannot be a little bit more accurate. I would be happy to deal with the sporadic data I see during the ride if the units could, after all is said and done, at least tell me what my avg speed was over the distance the unit recorded, but all that data is faulty because of all the sporadic speeds the head units and speed sensor does are instilling. Just tried the brand new Wahoo tri watch and it can't even meet or match Garmin's features. Some company has to get this right. One last thing, we all do not want or need a watch or head unit that has so many viewable screens, then by then instructions etc. I want a unit that tells me accurate travel pace, distance, and records the roads, paved or gravel, that I ride and can feel dive into when I get home. At no time have I ever used my watch or head unit to review or study my ride or run data, I do that at home with either Strava or Connect. Seems they were all better when they first came out and have gotten worse as the prices keep going up as they add more and more features no one can or will use.

Works well, long battery life. Only negative is the rubber band attachment doesn�t always work well with some hubs. Lost the unit on Campy Levante wheel set on a particularly rocky descent. Have added extra security by using zip ties.

I bought this so I would get the most accurate speed readings but I've been very disappointed. I've tried replacing the battery, resyncing with the head unit and putting it on facing the other direction but nothing changes. Ride distances are off by miles for the same ride and top speeds show 60 mph plus every time when that is obviously not accurate. Garmin offers no support or solution for this problem even though it has been reported by many users in their forums. I would not buy this again. It is frustrating and a waste of money.

I got two, one for my road wheel and one for my gravel wheel so I do not have to set the wheel circumference on my computer when switching wheels.

Pretty much a standard for Speed Sensors. Works well. Battery last an ok amount of time. Buy when on sale and you'll be happy : )

I bought this when I recently purchased a Garmin 830 to upgrade from a simple Cateye computer. Pairing the sensor with the 830 was simple. Once it was paired, I manually entered my tire circumference for accuracy. The Garmin head unit uses that value to make the calculations in real time instead of using GPS resulting in immediate and accurate data. Going for my first ride with the Cateye as a comparison and a backup, both units showed the same speed and distance at all times. Satisfied with the results, I happily removed the Cateye from the bike for good. The best part about the sensor is that it goes around the hub; no more having a sensor on the fork and a magnet on a spoke. It's clean, elegant, and won't get bumped by accident. All in all, this is a great accessory for the Garmin units.

Bought this speed sensor to use on my rollers and stationary trainer. Super easy to install and connect to Garmin computer.

Although a little pricey for what it does these days, it is effective and far from an expensive investment.

The unit supports bluetooth, slowly but surely we are getting to the point where everyone will need BT just to be considered for purchase (that day can't arrive soon enough). The device has a memory and will work in concert to keep track of rides for uploads later. This can be hilarious and annoying when you are truing a wheel and the device thinks you went on 10 bike rides of two minutes each...

The argument for a speed sensing device becomes more difficult as phones are more ubiquitous and track via GPS as you ride (granted revolutions of a wheel will likely be more accurate than gps will approximate your path but should be negligible).

Since I'm a data nut, I find it hard to believe there will be a day I don't take this along with me. Originally I purchased the device for a second bike since I can never remember to swap these things.

Ultimately I would (and likely will) buy it again.

Paired with my new Garmin Edge 1040 and pairs easily and works flawlessly. Very pleased.

I enjoy not having to attach a magnet to a spoke to use this sensor. But speed gets erratic when cycling over bridges and roads with a lot of steel in them. The sensor seems to get confused or sends distorted signals to my Garmin head unit. Some others in our club notice the same thing.

The speed sensor works flawlessly (like all my Garmin products). If you ride twisty singletrack, particularly in the woods, you really need to have one if you care at all about accuracy.

Speed on my edge 530 is not always accurate (although average speed seems correct). The speed sensor seems to always be accurate. Don't like adding stuff to the bike but this syncs flawlessly and corrects the edge 530 flaw.

Very easy to mount and set on on the Garmin Edge 530.

Very easy to mount and set on on the Garmin Edge 530.

I now have three of these on my various bikes. I bought a Velocomp Aeropod which requires a speed sensor. Just got lazy moving the speed sensor to my different bikes. Works well when you go into tunnels and tree cover. Do not experience speed dropouts anymore.

Easy to mount to any hub, quickly pairs with head unit. Even did a software update automatically.

Provides a more accurate measure of distance and speed if satellite reception is weak, like in an area with lots of tunnels. However, you should do an manual wheel roll-out with a metric tape measure. The sensor basically counts wheel rotations, just like the old wired cyclometers, so it's only as accurate as your wheel roll-out. The Garmin devices will attempt to estimate your wheel diameter for you, but it is wildly inaccurate. Don't trust it.

Paired to edge 530 & edge explore immediately. It saves 300hrs of data if your computer runs out of juice.

I thought I needed this but since Garmin uses satellite for speed, it is not really a necessity

So easy to install and looks to be very accurate. Now I don't have to put something on my spoke which I hated. Just put this on hub and you're ready to go. Love it.