Premium Speed and Cadence Bike Sensor

Collect crucial bike speed and cadence data during your workout. Easy to attach to most bikes, even easier to read the data on your iPhone when paired with the Fisica Sensor or Case.

The Wahoo Fitness Speed/Cadence Sensor is a durable, easy to use device that delivers reliable bicycle speed and cadence information.  The Wahoo Speed/Cadence sensor consists of two small sensors connected via a short wire.  This allows for the optimal placement near the crank and rear wheel spoke.  Solves many issues caused by a single piece unit that must be mounted in a single, not always ideal position.  Cadence sensor can be tucked directly behind the bottom bracket out of the wind stream for better aerodynamics.  All mounting hardware is included.  Can also be easily modified for use with recumbent bicycles, contact us for more details. 

Fisica wirelessly connects your iPhone to your favorite ANT+ fitness measuring devices. With fisica, your phone, your favorite playlists, the best fitness Apps and real-time activity information are all in the palm of your hand - or on your arm, or mounted on your bike, or in your pocket.

What is it?
• Your Wahoo Fitness bicycle Speed and Cadence Sensor is a device that determines your tire rotation rate (speed) and pedal rotation rate (cadence).

How do I use it? View Image Instructions
• Attach the Speed/Cadence Sensor to the top of the rear chain stay on the side opposite the drive train - with the Speed Sensor to the back, Cadence Sensor toward the front. Test fit so that the Cadence Sensor is aligned 3/4 up the crank arm (toward pedal) when the crank arm passes the rear chain stay and then extend the Speed Sensor back so that the tether is fully extended.
  1. To attach the Speed Sensor, loosely clamp Speed Sensor to frame with two enclosed cable ties to the frame aligned to inside of the back wheel.
  2. To attach Cadence Sensor, loosely attach Cadence Sensor with two enclosed cable ties to the frame closest to the pedal arm.
• Attach Pedal Magnet. Place the Pedal Magnet on the crank arm so that it is aligned with the Cadence Sensor. Attach pedal magnet using two enclosed cable ties to the crank arm. Rotate Cadence Sensor toward Pedal Magnet so that it is as close as possible. Do not tighten cable ties until you test to ensure consistent readings.
• Attach Spoke Magnet. Unscrew the Spoke Magnet and attach to a spoke by sandwiching the spoke between the screw/magnet and its plastic housing, ensuring it is aligned with the Speed Sensor. Rotate Speed Sensor toward Spoke Magnet so that it is as close as possible.
• Turn the crank several times to ensure each sensor is working and the magents are aligned properly. Tighten all cable ties.

How do I wake the sensor up?
• Your Wahoo Fitness Speed/Cadence Sensor ‘sleeps’ with inactivity and ‘awakens’ when readings begin so a few turns of your bicycle crank are be required before the sensor begins emitting data.

How do I pair it with my device? Doesn't it need a tire size?
• Each Wahoo Fitness Sensor has a unique identification code and can be uniquely paried with a display device or reader so that it will always be recognized when it is activated and within range. In addition, your Speed Sensor requires a tire size calibration to determine accurate speed information. Since each reader is unique, you should reference the instructions of your reader for pairing and sizing techniques.

How do I change the battery?
• The battery in your Wahoo Fitness Speed/Cadence Sensor is located behind a cover on the back of your Sensor and can be replaced by placing a coin in the slot and turning the cover 1/4 turn counterclockwise. Replace with a 3 volt CR2032 battery (contact a local waste handling group for proper disposal of old battery). Wait 45 seconds before installing the new battery to ensure the electronics fully reset.