Tech Specs
Garmin HRM-Tri Heart Rate Monitor for Swimming and Multisport Training
Introduction
The Garmin HRM-Tri is a specialized chest strap heart rate monitor engineered for swimmers, cyclists, and runners who need continuous heart rate data across all three disciplines. Unlike standard fitness trackers, this device captures and stores heart rate information while you're underwater—data that syncs to your compatible Garmin sports watch once you exit the water. For triathletes and multisport athletes, this means no gaps in your training data, enabling you to review effort levels across each discipline and identify where you're working hardest and recovering best.
Key Features
- Underwater data storage with delayed transmission to compatible Garmin devices for continuous performance tracking
- Water resistance rated to 50 meters, suitable for pool and open water swimming conditions
- Battery life of up to 10 months during regular training use, reducing maintenance frequency
- Six running dynamics metrics including cadence, stride length, and ground contact time when paired with a compatible Garmin device
- Weight of 1.2 ounces, making it the smallest and lightest heart rate monitor module to minimize drag and bulk during swims
- Adjustable strap design with soft, rounded edges and covered seams to fit diverse body types without chafing
Data Insights
Research shows that athletes using heart rate monitors during training can achieve performance improvements of up to 20%. The HRM-Tri delivers actionable insights by measuring cadence, stride length, and ground contact time—metrics that help you identify biomechanical inefficiencies and prevent overuse injuries. By monitoring heart rate zones across swimming, cycling, and running, you can fine-tune your training intensity and recovery periods based on actual physiological response rather than perceived effort.
Usage Instructions
Wear the HRM-Tri snugly around your chest with the sensor aligned at your sternum for accurate heart rate detection. Activate your compatible Garmin device to begin tracking. After each swim, rinse the strap with fresh water to preserve the fabric and sensor integrity over time. The device pairs wirelessly with Garmin watches and cycling computers that support ANT+ connectivity.
Design and Material
The HRM-Tri combines aerodynamic engineering with practical comfort, designed to stay secure during high-intensity training and transitions without restricting movement. Every component is selected for durability in chlorinated pools, saltwater, and sweat-heavy conditions.
- High-performance fabric construction that maintains softness against skin while resisting degradation from repeated exposure to water and chlorine
- Seamless construction throughout the strap eliminates pressure points and reduces chafing during extended training sessions
- Adjustable strap with multiple size options to accommodate different chest circumferences and body types
- Lightweight build at 1.2 ounces minimizes drag during swimming and reduces fatigue during transitions
- Robust sensor module withstands frequent temperature changes, mechanical stress, and the rigorous demands of multisport training
- Modern blue and black color scheme integrates seamlessly with current Garmin wearables and training gear
Final Verdict
The Garmin HRM-Tri solves a specific problem for triathletes: capturing heart rate data underwater where standard chest straps fail. If you're training seriously across multiple sports and want complete visibility into your effort across each discipline, this monitor delivers the continuous data you need to optimize pacing, prevent overtraining, and track real progress. Order yours today to eliminate data gaps and gain the competitive insights that separate casual training from structured improvement.
In The Box
- HRM-Tri
- Strap Extender
- Manuals
Manual & Warranty
Do you have an old GPS unit lying around? The GPS Nation Trade In and Up program is a great way to trade in your old and used GPS for credit towards a new GPS. The choice is entirely yours! We’ve made the process simple and streamlined. Follow these simple steps, and you will be on your way to receiving credit towards your brand new GPS!
1. Get a quote
To get your free quote, provide your GPS type, manufacturer, model, and condition. Within 24 hours, you will receive a quote for the trade-in value of your current product. The GPS trade-in/trade-up form is at the bottom of this page.
2. Ship your product(s) for trade
After accepting our offer, pack your product(s) safely and ship them to us using the pre-paid shipping label provided to you. We will provide a confirmation email when your trade-in arrives at our warehouse. You have 30 days from the date you complete your on-line trade to ship the product to GPS Nation.
3. Make your purchase
Once we receive your product at our warehouse and we validate the stated condition, we will send you a confirmation email. If you elect to receive credit towards a new GPS at gpsnation.com, your store credit will be issued, and you are free to make your purchase.
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Ask a Question
Tech Specs
Garmin HRM-Tri Heart Rate Monitor for Swimming and Multisport Training
Introduction
The Garmin HRM-Tri is a specialized chest strap heart rate monitor engineered for swimmers, cyclists, and runners who need continuous heart rate data across all three disciplines. Unlike standard fitness trackers, this device captures and stores heart rate information while you're underwater—data that syncs to your compatible Garmin sports watch once you exit the water. For triathletes and multisport athletes, this means no gaps in your training data, enabling you to review effort levels across each discipline and identify where you're working hardest and recovering best.
Key Features
- Underwater data storage with delayed transmission to compatible Garmin devices for continuous performance tracking
- Water resistance rated to 50 meters, suitable for pool and open water swimming conditions
- Battery life of up to 10 months during regular training use, reducing maintenance frequency
- Six running dynamics metrics including cadence, stride length, and ground contact time when paired with a compatible Garmin device
- Weight of 1.2 ounces, making it the smallest and lightest heart rate monitor module to minimize drag and bulk during swims
- Adjustable strap design with soft, rounded edges and covered seams to fit diverse body types without chafing
Data Insights
Research shows that athletes using heart rate monitors during training can achieve performance improvements of up to 20%. The HRM-Tri delivers actionable insights by measuring cadence, stride length, and ground contact time—metrics that help you identify biomechanical inefficiencies and prevent overuse injuries. By monitoring heart rate zones across swimming, cycling, and running, you can fine-tune your training intensity and recovery periods based on actual physiological response rather than perceived effort.
Usage Instructions
Wear the HRM-Tri snugly around your chest with the sensor aligned at your sternum for accurate heart rate detection. Activate your compatible Garmin device to begin tracking. After each swim, rinse the strap with fresh water to preserve the fabric and sensor integrity over time. The device pairs wirelessly with Garmin watches and cycling computers that support ANT+ connectivity.
Design and Material
The HRM-Tri combines aerodynamic engineering with practical comfort, designed to stay secure during high-intensity training and transitions without restricting movement. Every component is selected for durability in chlorinated pools, saltwater, and sweat-heavy conditions.
- High-performance fabric construction that maintains softness against skin while resisting degradation from repeated exposure to water and chlorine
- Seamless construction throughout the strap eliminates pressure points and reduces chafing during extended training sessions
- Adjustable strap with multiple size options to accommodate different chest circumferences and body types
- Lightweight build at 1.2 ounces minimizes drag during swimming and reduces fatigue during transitions
- Robust sensor module withstands frequent temperature changes, mechanical stress, and the rigorous demands of multisport training
- Modern blue and black color scheme integrates seamlessly with current Garmin wearables and training gear
Final Verdict
The Garmin HRM-Tri solves a specific problem for triathletes: capturing heart rate data underwater where standard chest straps fail. If you're training seriously across multiple sports and want complete visibility into your effort across each discipline, this monitor delivers the continuous data you need to optimize pacing, prevent overtraining, and track real progress. Order yours today to eliminate data gaps and gain the competitive insights that separate casual training from structured improvement.
In The Box
- HRM-Tri
- Strap Extender
- Manuals
Manual & Warranty
Trade-In
Do you have an old GPS unit lying around? The GPS Nation Trade In and Up program is a great way to trade in your old and used GPS for credit towards a new GPS. The choice is entirely yours! We’ve made the process simple and streamlined. Follow these simple steps, and you will be on your way to receiving credit towards your brand new GPS!
1. Get a quote
To get your free quote, provide your GPS type, manufacturer, model, and condition. Within 24 hours, you will receive a quote for the trade-in value of your current product. The GPS trade-in/trade-up form is at the bottom of this page.
2. Ship your product(s) for trade
After accepting our offer, pack your product(s) safely and ship them to us using the pre-paid shipping label provided to you. We will provide a confirmation email when your trade-in arrives at our warehouse. You have 30 days from the date you complete your on-line trade to ship the product to GPS Nation.
3. Make your purchase
Once we receive your product at our warehouse and we validate the stated condition, we will send you a confirmation email. If you elect to receive credit towards a new GPS at gpsnation.com, your store credit will be issued, and you are free to make your purchase.
Overview
Garmin HRM-Tri Heart Rate Monitor for Swimming and Multisport Training
Introduction
The Garmin HRM-Tri is a specialized chest strap heart rate monitor engineered for swimmers, cyclists, and runners who need continuous heart rate data across all three disciplines. Unlike standard fitness trackers, this device captures and stores heart rate information while you're underwater—data that syncs to your compatible Garmin sports watch once you exit the water. For triathletes and multisport athletes, this means no gaps in your training data, enabling you to review effort levels across each discipline and identify where you're working hardest and recovering best.
Key Features
- Underwater data storage with delayed transmission to compatible Garmin devices for continuous performance tracking
- Water resistance rated to 50 meters, suitable for pool and open water swimming conditions
- Battery life of up to 10 months during regular training use, reducing maintenance frequency
- Six running dynamics metrics including cadence, stride length, and ground contact time when paired with a compatible Garmin device
- Weight of 1.2 ounces, making it the smallest and lightest heart rate monitor module to minimize drag and bulk during swims
- Adjustable strap design with soft, rounded edges and covered seams to fit diverse body types without chafing
Data Insights
Research shows that athletes using heart rate monitors during training can achieve performance improvements of up to 20%. The HRM-Tri delivers actionable insights by measuring cadence, stride length, and ground contact time—metrics that help you identify biomechanical inefficiencies and prevent overuse injuries. By monitoring heart rate zones across swimming, cycling, and running, you can fine-tune your training intensity and recovery periods based on actual physiological response rather than perceived effort.
Usage Instructions
Wear the HRM-Tri snugly around your chest with the sensor aligned at your sternum for accurate heart rate detection. Activate your compatible Garmin device to begin tracking. After each swim, rinse the strap with fresh water to preserve the fabric and sensor integrity over time. The device pairs wirelessly with Garmin watches and cycling computers that support ANT+ connectivity.
Design and Material
The HRM-Tri combines aerodynamic engineering with practical comfort, designed to stay secure during high-intensity training and transitions without restricting movement. Every component is selected for durability in chlorinated pools, saltwater, and sweat-heavy conditions.
- High-performance fabric construction that maintains softness against skin while resisting degradation from repeated exposure to water and chlorine
- Seamless construction throughout the strap eliminates pressure points and reduces chafing during extended training sessions
- Adjustable strap with multiple size options to accommodate different chest circumferences and body types
- Lightweight build at 1.2 ounces minimizes drag during swimming and reduces fatigue during transitions
- Robust sensor module withstands frequent temperature changes, mechanical stress, and the rigorous demands of multisport training
- Modern blue and black color scheme integrates seamlessly with current Garmin wearables and training gear
Final Verdict
The Garmin HRM-Tri solves a specific problem for triathletes: capturing heart rate data underwater where standard chest straps fail. If you're training seriously across multiple sports and want complete visibility into your effort across each discipline, this monitor delivers the continuous data you need to optimize pacing, prevent overtraining, and track real progress. Order yours today to eliminate data gaps and gain the competitive insights that separate casual training from structured improvement.



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