Wahoo Blue SC

So after a few trips down the rail trail and back I decided that I didn’t really want to trust A-GPS from my iPhone 5S to deliver accurate speed and distance information to Cyclemeter.   After all, if I’m going to ride forty-odd miles and then analyze the ride data later, shouldn’t it be accurate?  So I needed a speed sensor.

Cyclemeter is compatible with a wide range of devices.  Given my application, I decided to pick up a Blue SC from Wahoo Fitness.  This tracker will not only do speed, but also cadence.  Initially cadence wasn’t important to me, but after reviewing ride data for a few short runs, I’ve found it to be useful in improving my pace in a few spots that have rough asphalt or hills. 

The Wahoo Blue SC includes the main unit, a magnet to attach to a spoke for the speed sensor, and a magnet that slips onto the crank to measure cadence. 

Wahoo Fitness Blue SC

 The devices look something like this when installed: 

Lower red arrow is cadence magnet

 Here it is on my bike: 

 Unfortunately the magnet on the crank is pretty easy to kick off the bike apparently.  Mine seems to have gone missing at about the 12 mile mark: 

Lost the crank magnet!

 I’ll have to contact Wahoo Fitness for a replacement, but in the meanwhile, I’ve got a magnet pulled out of an old hard disk affixed to the back side of the crank.  In a very brief test, it seemed to deliver the desired result.  This is a lot less bulky than the magnet that came with it, so if I’m lucky, it won’t go flying off at speed. 

Hope it stays on!

 I’ll have to let you know!

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