CAT EYE HR-12 160-3980 Heart Rate Sensor Speedometer Bicycle: Heart rate monitoring
Joanna Stern here, and let me tell you about this little gadget that’s about to become your cycling BFF. The CAT EYE Heart Rate Sensor HR-12? Yeah, it’s the kind of tech that makes you wonder how you ever rode without it. Compact, yes, but don’t let its size fool you. This thing is like having a personal trainer strapped to your bike, whispering (okay, not literally) your heart rate and speed stats in real-time. Perfect for when you’re trying to crush your fitness goals or just not die on that hill you thought was a good idea. Installation? Easier than convincing yourself that yes, you do need another bike accessory. And whether you’re a Tour de France hopeful or someone who just likes to pretend they are on weekends, the HR-12 dishes out the kind of data that’ll either make you proud or slightly terrified of your current fitness level. Rain or shine, this durable little trooper sticks with you, making it the reliable sidekick for every ride, from your driveway to the middle of nowhere. So, ready to geek out on your cycling stats?
- Speed tracking
- Bicycle compatible
- Compact design
- Easy installation
- Heart rate monitoring
General specs
- Brand: CAT EYE
- Model: HR-12 160-3980
- Seller: Joom
- Compatibility: Bicycles
- Functions: Heart rate monitoring, Speed tracking
- Design: Compact, Durable
- Installation: Easy
If you are interested in more details, you can find full information on the seller's page.
View on seller's site
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$89.71
Last price update: 8/7/25
Available to order
Shipping options
Delivery to 
United States
United States
Unavailable
Comparison with similar products
| This item | Recommendations | |||||
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CAT EYE HR-12 160-3980 Heart rate monitoring
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CAT EYE ISC-12 Bluetooth SMART connectivity
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Fitness Tracker Watch with Heart Rate Monitor Health Monitoring
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IGPSport 200s
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Cycling Speed/Cadence Sensor Wireless Bluetooth/Ant+ connectivity
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Bryton Smart Dual Sensor ANT+ Bluetooth 4.0 compatible
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| Brand | CAT EYE | CAT EYE | Imzuc | IGPSport | Magene | Bryton |
| Model | HR-12 160-3980 | ISC-12 | 200s | Smart Dual Sensor | ||
| Color | ||||||
| Rating |
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| Price | $89.71 | $84.74 | $14.99 | $79.99 | $25.00 | $84.47 |
| Seller | Joom | Joom | Amazon | Gshopper | Gshopper | Joom |
| Update | August 7, 2025 | August 5, 2025 | June 27, 2025 | July 25, 2024 | July 25, 2024 | August 5, 2025 |
| Compatibility | Bicycles | Smartphones, Cycling computers | MTB, Road Bike | Road bikes, Spinning bikes, Trainers | ANT+, Bluetooth 4.0 | |
Heart Rate Sensor Speedometer Bicycle
$89.71
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