The Garmin Speed Sensor 2 is the essential tool for cyclists who demand accurate, real-time data without the need for a GPS signal. Whether you are riding through dense forest cover, under heavy urban infrastructure, or training indoors on a stationary trainer, this sensor provides precise speed and distance metrics by measuring the actual rotation of your wheel. It’s a "set-and-forget" upgrade that ensures your ride stats are never interrupted by satellite dropouts.
Featuring dual-band technology, the Speed Sensor 2 connects seamlessly via ANT+ and BLUETOOTH Low Energy, allowing you to sync simultaneously with your Garmin Edge cycle computer, compatible smartphones, and indoor training apps like Zwift. With its easy-to-install design, it requires no magnets or complex alignment, making it one of the most user-friendly sensors on the market.
Magnet-Free Installation: Wraps securely around the hub of either wheel using a durable rubber strap—no magnets, tape, or tools required.
Dual-Band Connectivity: Transmits data via ANT+ and Bluetooth Low Energy, ensuring compatibility with Garmin devices, watches, and third-party apps.
Autonomous Tracking: Features an internal memory that can track distance automatically even if you aren't using a head unit; it syncs to the Garmin Connect™ app later.
Odometer Function: Automatically records your total distance, making it the perfect tool for tracking maintenance intervals and equipment wear.
Real-Time Accuracy: Provides instant speed feedback, which is significantly more responsive than GPS-based speed during rapid acceleration or technical climbing.
Long Battery Life: Powered by a user-replaceable CR2032 coin cell battery, offering up to 1 year of typical use (approx. 1 hour per day).
| Feature | Specification |
| Communication | ANT+ / Bluetooth Low Energy (BLE) |
| Mounting | Hub-Mounted (Rear or Front) |
| Battery Type | CR2032 (Included) |
| Battery Life | Up to 12 Months |
| Water Rating | IPX7 (Splash, Rain, Snow Proof) |
| Compatibility | Edge Units, Fenix, Forerunner, Zwift, Rouvy |
Indoor Training Enthusiasts: If you use a "dumb" trainer and need to broadcast speed and distance to apps like Zwift or TrainerRoad.
Mountain Bikers & Commuters: Perfect for riders in heavy tree cover or "urban canyons" where GPS speed can be erratic or jumpy.
Data Completionists: Ideal if you want a permanent odometer for your bike to know exactly when your chain or tires need replacing, even on casual rides.
Strict Weight Weenies: If you are counting every single gram, you might prefer relying on GPS speed from your head unit, though you sacrifice some instantaneous accuracy.
E-Bike Integrated Systems: Many modern E-Bikes already have internal speed sensors built into the motor system that sync directly to compatible displays.
The Garmin Speed Sensor 2 is remarkably reliable, but the secret to consistent data is the "Wheel Circumference" setting. While most Garmin Edge units can "auto-calibrate" the wheel size using GPS, for the ultimate precision, we recommend performing a manual "roll-out" measurement and entering the exact millimeter value into your device. Also, when installing, try to mount it on the front hub if possible; it stays further away from the grime of the drivetrain and provides a slightly cleaner signal to your handlebar-mounted computer!
