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Sigma - Pedal Frequency Power Magnet Flat | Omnibikeparts | De shop voor fietsonderdelen en -accessoires.
Sigma STS Cadence Transmitter - Wheel & Sprocket | One of America's Best Bike Shops
Sigma Cadence Magnet, Black | Bikeinn
A Quick & Cheap Garmin Cadence Magnet Replacement - SLO Cyclist | An Online Road Bicycling Magazine
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