Garmin
Bike Speed and Cadence Sensor 2 Bundle for Cycling, Wireless ANT+ & Bluetooth
Bike Speed and Cadence Sensor 2 Bundle for Cycling, Wireless ANT+ & Bluetooth
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Garmin Bike Speed Sensor 2 & Cadence Sensor 2 Bundle
Complete wireless cycling sensor set — speed, distance, and cadence in one bundle. The Speed Sensor 2 mounts to the wheel hub, records rides without a head unit, and self-calibrates with compatible Edge computers. The Cadence Sensor 2 mounts to any size crank arm and measures pedal strokes per minute. Both sensors transmit on ANT+ and Bluetooth Low Energy simultaneously. Bundle MPN: 010-12845-00. Bundle UPC: 753759222550.
included
sensors
CR2032
distance cadence
I use both of these on all my bikes to get accurate info on my riding to improve my training. Easy sync. Works great with my Edge 530 — no dropouts.
Speed Sensor 2
- Mounts to wheel hub — front or rear
- Measures speed and distance
- Records rides without a head unit
- Self-calibrates with Edge computers
- Built-in odometer
- MPN: 010-12843-00
Cadence Sensor 2
- Mounts to crank arm — any size
- Measures pedal strokes per minute (RPM)
- Pairs to 2 BLE devices simultaneously
- No magnets — no alignment required
- Auto-wakes on crank rotation
- MPN: 010-12844-00
Our Take: The Speed and Cadence Sensor 2 Bundle pairs the two sensors that together give you the complete picture of what's happening on your bike — not just where you are or how fast you think you're going, but your actual wheel speed, your total distance, and your pedaling efficiency at the same time. Speed from GPS alone has real gaps: indoors it's zero, in tunnels it drops out, and on forested trails or urban canyons it can wander. The Speed Sensor 2 measures actual wheel rotation at the hub, giving you consistent speed and distance whether you're on a smart trainer in your garage, riding under a highway overpass, or deep in the woods. Its onboard memory records rides even when no head unit is paired — useful for commuter bikes, second bikes, or any time you ride without your Edge or Forerunner. Cadence from the wrist of a GPS watch is estimated and approximate; the Cadence Sensor 2 counts actual crank arm revolutions and reports real pedal RPM. For any rider working on pedaling efficiency — targeting an optimal 85–95 RPM range, analyzing effort distribution, or correlating cadence with heart rate and power — direct measurement from the crank is the only reliable method. Both sensors broadcast on ANT+ and Bluetooth Low Energy simultaneously. Pair both to your Garmin head unit via ANT+ for ride recording, and to Zwift via Bluetooth for indoor training — all four connections active at the same time, one sensor each. Battery life is approximately 12 months per sensor on a CR2032 coin cell. Each sensor includes two rubber band sizes and all mounting hardware — no tools required for either installation.
Why you'd choose this bundle
- Speed and cadence are complementary metrics. Speed tells you how fast the wheel is moving; cadence tells you how efficiently you're generating that motion. Together they reveal gear ratio efficiency, identify when you're pushing too big a gear at low cadence, and give your training apps and head unit a complete picture of your cycling output without a power meter.
- The Speed Sensor 2 has onboard memory and stores speed and distance internally when no device is actively paired. Ride your commuter, trainer, or second bike without your Edge or Forerunner and the sensor records everything independently, then auto-uploads to Garmin Connect the next time the app is nearby.
- Each sensor broadcasts on both ANT+ and Bluetooth LE at the same time. Pair both to your Garmin head unit via ANT+ and to Zwift or a training app via Bluetooth simultaneously — all four connections active, live speed and cadence data on every platform without any switching.
- On a smart trainer or rollers, the Speed Sensor 2 delivers real hub-based wheel speed to Zwift and other training apps — giving you accurate indoor distance and pace that GPS-based speed cannot provide (GPS shows zero indoors).
- Compatible Edge cycling computers automatically detect your wheel size by comparing sensor rotations to GPS distance and calibrate the sensor output to match. No manual wheel circumference lookup or entry required — just pair and ride a short distance.
- Neither sensor uses magnets. The Speed Sensor 2 rubber-bands to the wheel hub axle. The Cadence Sensor 2 rubber-bands to the crank arm. No spoke magnets to position, no sensor arms to align, no wheel-size-dependent alignment. Both move between bikes quickly with no reconfiguration.
- The Speed Sensor 2 accumulates total distance across all rides on that bike — paired or unpaired. View per-bike odometer in Garmin Connect and use it to schedule chain replacement, cassette service, and other mileage-based maintenance intervals.
- Both sensors run approximately 12 months at one hour of daily riding on a CR2032 coin cell. Each sensor's LED flashes red before the battery runs out. Both batteries are user-replaceable without tools — standard CR2032 cells available at any pharmacy.
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Perfect For
- Cyclists who want complete speed, distance, and cadence data without a power meter
- Indoor training on smart trainers where GPS is unavailable — both sensors work via Bluetooth
- Riders building on an existing Garmin Edge or Forerunner setup who want full sensor coverage
- Commuters who want ride data even when not carrying a head unit
- Anyone tracking cadence to improve pedaling efficiency and gear selection
- Triathletes using Garmin multisport devices who want hub speed and crank cadence on the bike leg
Good to know before you buy
- Speed Sensor 2 measures speed and distance only — does not measure cadence
- Cadence Sensor 2 measures pedal RPM only — does not measure speed or distance
- Wheel size calibration required on first speed sensor use — self-calibrate with a compatible Edge, or set manually in Garmin Connect
- Speed sensor: wheel hub mount (front or rear), two rubber band sizes included
- Cadence sensor: non-drive-side (left) crank arm, 8.18mm clearance required, two rubber band sizes included
- Both sensors auto-wake on movement — no buttons to press before a ride
Bundle Specifications
| Specification | Speed Sensor 2 | Cadence Sensor 2 |
|---|---|---|
| Bundle MPN | 010-12845-00 | |
| Bundle UPC | 753759222550 | |
| Individual MPN | 010-12843-00 | 010-12844-00 |
| Measures | Speed and distance | Cadence (pedal RPM) |
| Mounting | Wheel hub — front or rear | Crank arm — non-drive side |
| Magnets required | No | No |
| Wireless protocols | ANT+ and Bluetooth LE | ANT+ and Bluetooth LE |
| BLE device pairings | Up to 2 simultaneously | Up to 2 simultaneously |
| ANT+ pairings | Unlimited | Unlimited |
| Records without head unit | Yes — stores internally | No — requires active connection |
| Self-calibration | Yes — with compatible Edge | N/A |
| Odometer | Yes — cumulative per-bike | No |
| Clearance required | None (hub mount) | 8.18mm crank-to-frame |
| Auto-wake | 2 wheel revolutions | 2 crank revolutions |
| Battery | CR2032 user-replaceable | CR2032 user-replaceable |
| Battery life | ~12 months at 1 hr/day | ~12 months at 1 hr/day |
| Color | Black | Black |
| Indoor training (Zwift) | Yes — hub speed via Bluetooth | Yes — crank cadence via Bluetooth |
| Warranty | 1-year limited (each sensor) | |
| CA Prop 65 | Warning: contains lead — wash hands after handling | |
Frequently Asked Questions
What does each sensor measure?
The Speed Sensor 2 measures wheel speed and distance by counting hub rotations. The Cadence Sensor 2 measures pedal strokes per minute (RPM) by counting crank arm revolutions. Neither sensor measures the other metric — speed does not include cadence, and cadence does not include speed. Together they give you speed, distance, and cadence in one bundle.
Can the speed sensor record rides without a Garmin head unit?
Yes — the Speed Sensor 2 has onboard memory that stores rides independently when no device is paired. It records speed, distance, and duration automatically, then uploads to Garmin Connect the next time the app is within Bluetooth range. The Cadence Sensor 2 does not have this capability — it requires an active paired connection to record cadence data.
Do both sensors work with Zwift for indoor training?
Yes. Both connect to Zwift via Bluetooth LE. The Speed Sensor 2 provides real hub-based wheel speed for accurate indoor distance. The Cadence Sensor 2 provides live pedal RPM. Together they give Zwift complete speed and cadence data from the actual bike without relying on GPS or trainer virtual speed estimates.
Can both sensors pair to my head unit and Zwift at the same time?
Yes. Each sensor pairs to up to 2 Bluetooth devices simultaneously plus unlimited ANT+ devices. In practice: your Garmin Edge or Forerunner connects to both sensors via ANT+, and Zwift connects to both via Bluetooth — all four connections active at the same time, live speed and cadence data on every platform simultaneously.
How do I set up wheel size for accurate speed readings?
Two options. Pair the Speed Sensor 2 to a compatible Garmin Edge and allow it to self-calibrate — the Edge compares sensor rotations to GPS distance over a short ride and adjusts automatically. Or enter your wheel circumference in millimeters manually in the Garmin Connect app under the sensor's settings. Self-calibration is faster and more accurate.
Where does each sensor mount?
The Speed Sensor 2 attaches to the axle of your wheel hub — either front or rear — using the included rubber band. The Cadence Sensor 2 attaches to the inside face of your non-drive-side (left) crank arm using a rubber band. Neither sensor uses magnets. Both include two band sizes. The Cadence Sensor 2 requires 8.18mm of clearance between the crank arm and the frame, which the vast majority of bikes have.
Are the sensors compatible with non-Garmin devices?
Yes. Both sensors work with any device or app that supports the ANT+ speed or cadence sensor profile, and any Bluetooth-enabled app that accepts Bluetooth LE speed or cadence input. Non-Garmin ANT+ head units receive data via ANT+, and any Bluetooth training app receives data via BLE. Neither sensor is proprietary to Garmin hardware.
What is the difference between buying this bundle vs. the sensors individually?
The bundle (MPN: 010-12845-00, UPC: 753759222550) contains both the Speed Sensor 2 (MPN: 010-12843-00) and the Cadence Sensor 2 (MPN: 010-12844-00) in a single package. The hardware is identical to buying each sensor separately — you get the same sensors, same rubber bands, same batteries, and same documentation. The bundle is the most convenient option if you want both.
CA Residents: Proposition 65 Warning — this product contains lead. Contact the seller through eBay messaging for details.
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We do not accept returns or cancel for change of mind. We only offer returns for items that are faulty or damaged.
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