A cycling cadence sensor that delivers real-time RPM data to bike computers and training apps. Riders gain confidence knowing pedalling efficiency and interval targets are tracked reliably. Is CooSpo Cadence Sensor BK9C the right fit for your trainer sessions and road rides?
⚡ At a Glance
- • Measurement Accuracy: Tracks crank-arm revolutions per minute for immediate cadence readouts
- • Best for: Cyclists using smart trainers or bike computers for structured workouts
- • Not ideal for: Riders who need integrated power measurement or pedal-based sensors
Measures pedalling rate in revolutions per minute and outputs data for trainers and apps. Simple RPM feedback helps riders refine cadence during sessions.
Train with precise cadence data – thanks to ANT+ and Bluetooth 5.0
Cadence detection counts crank-arm revolutions and broadcasts RPM in real time over ANT+ and Bluetooth 5.0 to compatible receivers and apps. Dual-band transmission keeps a live stream available for bike computers and workouts.
Real-time cadence readings allow accurate interval work and cadence-focused drills so riders can measure improvements session to session.
Works with popular apps and trainers – with broad device compatibility
Dual-band connectivity pairs with a wide range of bike trainers, cycling apps and GPS watches. Recommended apps include Rouvy, Zwift, Peloton and Wahoo, though Wahoo app pairing may restrict two-sensor setups from other brands.
Use the same cadence source for indoor and outdoor training, making data consistent across platforms and simplifying training plans.
Durable, low-maintenance design – with replaceable battery and waterproofing
Runs on a CR2032 replaceable battery offering around 300 hours of operation and carries an IP67 rating for water and dust resistance. Mounting is magnet-free with a universal crank-arm attachment designed to fit most frames.
Long battery life and robust sealing reduce maintenance between rides, and the simple crank mount keeps setup quick and tool-free.
✨ The 4 Key Reasons for CooSpo Cadence Sensor BK9C
- Dual-band Connectivity - Connects to ANT+ and Bluetooth 5.0 devices for live cadence data.
- CR2032 Battery - Provides roughly 300 hours of riding between replacements.
- Magnet-free Crank Mount - Simple universal fit for most frames and crank arms.
- App Compatibility - Works with Rouvy, Zwift, Peloton and many trainers.
📋 Technical Details at a Glance
- Category: Cycling cadence sensor
- Brand: CooSpo
- Model: BK9C
- Sensor type: RPM cadence sensor
- Connectivity: ANT+ and Bluetooth 5.0
❓ Frequently Asked Questions
Q: How does the cadence sensor attach to a bike?
A: Crank-arm attachment clamps onto the crank arm with a magnet-free universal fit that suits most frames and crank sizes.
Q: Which apps and trainers will accept cadence data?
A: ANT+ and Bluetooth 5.0 allow pairing with bike computers, trainers and GPS watches; recommended apps include Rouvy, Zwift, Peloton and Wahoo, though Wahoo may limit certain multi-sensor pairings.
Q: How long does the battery last and can it be replaced?
A: Operates on a CR2032 replaceable battery with around 300 hours of working time before replacement.
🏆 Our Verdict
Suitable for cyclists who use smart trainers or bike computers and want consistent cadence data across platforms. Dual-band connectivity, universal crank mounting and long battery life make it dependable for indoor and outdoor use. Durable construction and replaceable battery deliver practical long-term value without frequent upkeep.
