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

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.

The installation was a bit tricky and took some time, but I made it work with some extra parts and electrical tape.
The chainstay on my bike is large and there is very little space between the chainstay and the spokes so I could not use the rubber band that came in the package. I definitely wanted to keep the speed sensor facing down so I zip-tied the cadence sensor and then taped the speed sensor to the chainstay with electrical tape. I put a lot of pressure on the tape which kept the speed sensor flush to the chainstay and allowed for the spokes to clear. However, there was not enough clearance to fit the spoke magnet directly over the line on the speed sensor. To get around this, I had to buy a separate magnet that I taped to a spoke as close to the sensor as possible. Its not perfect, but it works.

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.