Reviews for Wahoo Fitness Blue SC Cycling Speed/Cadence Sensor for iPhone

A terrific little gadget for the avid cyclist. The only sensor currently available that uses low-energy Bluetooth Smart, so that the sensor battery should last over a year. Uses a standard replaceable watch battery inside. It is waterproof and mounts solidly, so it's fine for both road and trail use. The only problem is that the magnet and rubber loop for the sensor will not fit on larger-diameter aluminum mountain bike frames with thick crank arms and chainstays. Also, it has a slight tendency to be tilted by a fraction of an inch during use or transport, which may cause loss of sensor readings and require a quick re-adjustment. But overall, a must-have accessory. Works great with Cyclemeter. The speed reading is much more accurate than GPS.

I moved to this unit from my ANT device since the iPhone 5 bluetooth is pretty reliable for my fitness devices. I use the heart monitor and the Blue SC device from wahoo. I can get the cadence to work but the speed arm doesn't. I even removed the device and did the manual test by moving the magnet over the notched area on the arm using the wahoo utility but to no avail the speed doesn't record. I purchased a second unit to see if the first unit was bad, changed everything out but still the same results from all the test; cadence works fine but the speed arm doesn't. I will contact wahoo to see if my lot number is from a bad manufacturing batch. I've installed over 4 of these types of devices so I understand how to line everything up.

The Wahoo sensor is well made and integrates well with the Wahoo app, unfortunately though I could not fit it to my Specialized Roubaix. The oversized carbon fibre chain stays meant that there just isn't enough clearance for the magnet and the sensor arm to be able to pass each other. At best I need I think it needs at least another 1/4 to 1/2 inch.

I've given them a 4 star rating as I believe that if it fits the bike then it would be a great product and obviously catering for every bike manufacturer is always a difficult task.