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Wahoo Blue SC Speed and Cadence Sensor, Bluetooth / ANT+
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- Track and capture real-time speed, cadence and distance on your iPhone, Android, and bike computer. NOTE:Kindly refer the user manual before usage of the product.
- Connects wirelessly via Bluetooth 4.0 and ANT+ to your iPhone, Android and/or bike computer. The magnet will have to pass within 1/8 inch to get a reading
- Works with Zwift and TrainerRoad! Capture cadence on your favorite indoor cycling platform, No tangled wires on your bike to connect the sensor to your device.
- Also works with the free Wahoo Fitness app, Strava, RideWithGPS, MapMyRide, Cyclemeter, and more!. Supported iDevices: iPhone,iPhone 4S and newer,iPad,iPad (3rd gen and newer),iPod ,iPod Touch (5th gen)
- Lightweight and easy to install, comes with both rubber band and zip tie mounts. Universal fit - works with most bikes and frame sizes.
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From the manufacturer
Accurate Speed and Cadence Data
Track and capture real time cycling speed and cadence data on your iPhone, Android or Bike Computer.
Blue SC works with most bikes and frame sizes. Rubber band and zip tie mounts included.
No more tangled wires! Bluetooth and ANT+ capabilities allow for wireless connection to both smartphones and bike computers.
Sleek, Lightweight Design
Sensors weigh only 36 grams. Perfect for spin class or use with multiple bikes.
CR2032 replaceable coin cell battery. Lasts up to 12 months. No recharging.
Third Party Apps
Send data to your favorite cycling apps - Wahoo Fitness , Strava, RideWithGPS, MapMyRide, Cyclemeter, and more.
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How to install the Wahoo Blue SC: Place the sensor on the rear chain stay of your bike, near the pedal. The logo should be facing up and the arm of the sensor should be inside the rear chain stay, facing down. You may need to loosen the arm of the sensor with a 2mm allen wrench to move it into the correct position. Secure the sensor in place with the provided rubber band or zip-ties, whichever is preferred. If using zip-ties, do not completely tighten yet as the magnets still need to be aligned before completely securing the sensor in place. We recommend using the zip-ties for the most secure connection. Take off the pedal on the same side and slip the pedal magnet onto the crank, magnet facing in towards the sensor. Align so that the magnet will pass by the indicator line on the body of the Wahoo Blue SC sensor. The magnet will have to pass within 1/8 inch (about 4mm) to get a reading. As such, adjust the position of the sensor and/or magnet if required. Replace your pedal. Screw the wheel magnet onto any spoke on your back wheel, facing in towards the sensor. Align so that the magnet will pass by the indicator line on the arm of the Wahoo Blue SC sensor. The magnet will have to pass within 1/8 inch (about 4mm) to get a reading. Once again, adjust the position of the sensor and/or magnet if required. Tighten the magnet in place on the spoke. Once satisfied with the magnet positioning, tighten and snip the ends of the zip-ties (if using).
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The Wahoo Blue SC is a great product with a great reputation (nearly every other cyclist I ride with has one). Being able to pair it with the Wahoo Tickr (heart rate monitor) via the free Wahoo Fitness iPhone App, makes an indoor trainer ride much more fun and interactive. The set-up can be a little tricky but the instructions are very clear and simple to follow.
Customer Support - the best I've seen
After successfully using the Blue SC for the first winter season (last year), 4 months or so passed before I had my first indoor ride of the new year. Unfortunately, when I opened the Wahoo Fitness App and started pedaling, I had no cadence/speed signal. Unfortunately, after doing a good bit of troubleshooting (battery replacement, re-positioning of the Blue SC sensors, etc.), I was still not able to get a signal. So using the "contact Customer Support" feature of the App, I contacted customer support. To my surprise, within an hour I received a reply email asking me to try a series of troubleshooting steps to see if they would resolve the problem. Unfortunately, they were the same steps I had already tried, but I walked through them again with the same results. When I provided them my results, without delay, they asked me to provide proof that I purchased the product so I sent them a screen shot of Amazon purchase(LOVE AMAZON!!). They immediately confirmed the unit was under warranty and issued a confirmation of shipment and a tracking number. Within ~3 days I received the replacement, installed it within 10 min and all is working great!!
I found that Wahoo now offers a speed sensor that does not depend upon the magnet technology. I contacted them in hopes they could help. Sadly, their response was I needed to return it to Amazon. I explained this was a faulty product and outside of the amazon 30 day return window - to which they responded by closing the ticket.
I have always read amazing things about Wahoo products and am honestly shocked over this outcome. I am expecting deliver of the $70 Wahoo TICKR FIT Heart Rate Armband today and will likely return it, as I do not feel I can trust their product nor support.
There is one small issue, though, which is annoying. I put this on my Specialized Roubaix, which has ovular chain stays. I attached it with two zip ties. I had to position the sensor at a specific angle so that it would work with the magnets on both the crank and the wheel. However, this specific angle is not the best fit on the bike's chain stay due to its oval shape. Every so often the unit will slightly move from the natural vibration of riding and the cadence sensor will end up too far from the magnet on the crank to register crank movement. When I notice this happening, I simply move it by hand the next time I stop. Still, I wish there was a way to anchor it more firmly without potential finish damage. Perhaps there is and I just do not know.
Top international reviews
The unit is reasonably easy to fit, with some shortcomings. It sits on the chainstay on the left hand (non-power) side by design; the main body of the unit measures cadence using a magnet fitted to the crank and the trailing arm measures rear wheel RPM using a magnet attached to any spoke. It comes with both a silicon band and cable ties to secure it to the stay, I used the ties and would recommend everybody does; I wouldn't trust the silicon on the road. The crank magnet requires that you remove the pedal to slip a silicon band over the end of the crank, this was no problem for me with a good pedal spanner, but might not be the same for everyone. The band itself was way too big for my crank, I'd guess the minimum circumference for a snug fit is about 5 centimetres, I solved this by wrapping a cable tie around the whole thing and pulling it tight with pliers.
The key to getting the unit working properly is to get both magnets close enough to their respective sensor; with a required maximum spacing of only 4mm this is easier said than done. The main unit must be tilted towards the crank by rotating it around the stay and there is a barely visibly indentation in the casing to align with the magnet. This naturally tilts the sensor arm towards the wheel but in my case not far enough and you'll need a 2mm allen key (not supplied) to loosed this and then rotate it. Again, alignment is to a hard to see moulded line and I had to do this by touch.
Once set up it linked smoothly to my phone (OnePlus 2), didn't require a firmware update and worked first time. The only piece of information I required was the diameter of the rear wheel. I've used this once to do 10 miles on a turbo-trainer but it seems to be effective and measures both speed and cadence accurately according to my back-of-an-envelope calculations so no arguments there.
I've only given it 4 stars because there are no instructions in the box and I found those online to be confusing. I downloaded a video guide, but ended up just figuring it out by myself; it all seems to be working fine so far so I don't seem to have gone too far wrong. Make sure you've got a pedal spanner, 2mm allen key, extra cable ties and pliers to hand before you start,
The Blue SC syncs up with the same Wahoo apps as their other products so the software behind the device is tried and tested. The product itself fits relatively easily to your bike. You'll need to attach a sensor to your rear wheel which measures road speed and one on to you left pedal crank which measures cadence/effort. The combination of these gives you more accurate data than GPS alone, although combined together gives you the best data possible.
Because it doesn't rely on GPS though, it opens up the door to a new avenue of cycle training. If you have a turbo trainer that you mount your bike on for training during the winter months then you can link your indoor rides up to the new breed of training apps such as Zwift. Through the Wahoo Blue SC it sends your cycling data to these online training apps allowing you to compete/train against/with riders from all over the world on simulated and real courses, displayed on your smart phone/tablet/smart telly. I've been a member of Zwift for a few months now and it really helped maintain my motivation through the winter months.
If you find data helpful to your training then the Wahoo Blue SC is an excellent partner.
A bit pricey, but in my opinion, it's a premium price for a premium product.
The unit is reliable and simple to manage via the Wahoo app (not great but adequate). For me this unit worked without fail every time I called on it until spring of 2020 - so I think its reliability is more than reasonable.
The setup is a pain. The mounting on the chainstays greatly depends on your frame. If you have chunky chainstays it won't fit comfortably and lots of adjustments required to fit (if at all). Mount the magnet on the crank arm and this is your cadence sorted.
The speed sensor requires the arm to be adjusted and magnet placed on the spoke. This again is fiddly and explains why accelerometers versions have come to replace magnet dependent sensors.
Definitely worth waking the device up, pairing with your head unit first and then decide how you mount the unit on your bike by trial and error. It may have to be hung upside down from the chainstays or face the opposite direction to ensure you have the best position for both speed and cadence sensors to work properly.
One other annoying point in 2020 is that you have no way of knowing the battery life of the device. The Wahoo app will give you connection strength (i.e. Bluetooth signal strength, ANT+ signals are pretty solid so no real need to monitor those) but it would be handy to see the battery life so you know when to change it as opposed to finding out mid ride, but I have yet to see any device that gives battery life of CR2032s so this isn't just this unit.
Anyway once mounted and set up, the unit is solid and lasted 4 years for me without fail. I replaced the batteries probably around 2~3 times a year. One tip is to access the battery doors by removing the rear wheels so you don't have to readjust every time you replace the batteries!
I had this attached to my indoor trainer whilst the weather was bad outside. It took ages to pair and was really frustrating. But, once it was working it was fine. Didn't use it during the summer as the weather was good. Tried to set it up again ready for winter but it was not pairing at all. Changed the battery and the lights would come on for 20 seconds the die. Wouldn't pair at all. Support said to replace the battery (again) and to reset with the battery upside down for 3 seconds. Didn't work. Dead.
Thrown it in the bin (via against the wall) and bought a Garmin instead (and filler for my wall)
This will improve my training as I can keep an eye on my RPM when out on the road. Works well with the Mobile App as well. Provides an extra incentive to train!