Garmin Bike Speed Sensor 2 and Cadence Sensor 2 Bundle

Monitor your exact pedaling cadence and real-time wheel speed outdoors or on the indoor trainer with the official Garmin Bike Speed Sensor 2 and Cadence Sensor 2 Bundle (010-12845-30). Completely magnet-free and wireless, both sensors install in minutes without requiring fragile spoke magnets or frame-mounted alignment parts—making them effortless to install or swap between road, gravel, mountain, and indoor bikes. Equipped with dual-band ANT+® and Bluetooth® Low Energy (BLE) transmitters, the Speed Sensor 2 and Cadence Sensor 2 stream live data simultaneously to your Garmin Edge® GPS bike computer, Forerunner®/fēnix® smartwatch, and indoor training apps like Zwift, TrainerRoad, and the Garmin Connect™ mobile app. Key Features & Engineering Highlights Hub-Mounted Speed Sensor 2 with Auto-Calibration: Straps directly around either front or rear wheel hub and self-calibrates with your Edge® cycling computer or Garmin device to deliver accurate speed and distance—even under dense tree cover, in tunnels, or on indoor rollers/trainers where GPS is unavailable. Standalone Odometer Memory: The Speed Sensor 2 stores ride distance internally and syncs directly to the Garmin Connect™ app even when you ride without a head unit, making it easy to track accurate component maintenance intervals. Magnet-Free Cadence Sensor 2: Fastens securely to any crank arm size using the three included silicone strap sizes, measuring accurate pedal strokes per minute (RPM) so you can train in your optimal efficiency zone. Dual ANT+® & Bluetooth® Connectivity: Pair with Garmin Edge computers, ANT+ radar/display units, and Bluetooth smartphones or tablets simultaneously. 1-Year Battery Life: Powered by user-replaceable CR2032 coin cell batteries rated for up to 12 months of regular riding (at 1 hour per day) with 1 ATM water resistance. In the Box & Specifications Garmin Part Number: 010-12845-30 UPC / GTIN: 753759345389 Wireless Protocols: ANT+® (2.4 GHz) and Bluetooth® 5.0 (BLE) Battery Type: User-replaceable CR2032 (installed in both sensors) Included in Box: Bike Speed Sensor 2 with integrated hub sleeve, Bike Cadence Sensor 2, 3x crank arm strap bands (small, medium, large), and documentation