Wahoo Blue SC Speed/Cadence Sensor (BT/ANT+) MFPN=K13-3100I-BLK The XM 421 is as

The XM 421 is as good as an All Mountain rim can get yet still fears no trail no matter what rock gardens it has on the menu

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Wahoo Blue SC Speed/Cadence Sensor (BT/ANT+) MFPN=K13-3100I-BLK The XM 421 is asDetails The Wahoo BlueSC speed and cadence sensor transforms your phone into a powerful cycling computer. Using Bluetooth Smart and ANT+ technology, it tracks cycling speed, cadence, and distance which can be paired with your favorite cycling app including Strava and Zwift, or paired to your bike computer. It's weatherproof, small with a low drag profile, and comes with a rubber band and zip tie mounts. Both ANT+ and Bluetooth Smart capabilities allow