Heart Rate Data in 3 Disciplines
- Specifically designed for triathletes
- Our smallest and lightest heart rate monitor (HRM)
- Comfortable, easily adjustable strap
- Stores and forwards heart rate data to your compatible Garmin device

Enhance your triathlon experience by pairing HRM-Tri with any compatible Garmin wearable. The HRM-Tri stores heart rate data when underwater, then forwards it to your wearable at the end of your swim. Our smallest and lightest heart rate monitoring module fits within the width of the strap. The strap's soft, rounded edges and covered seams make the strap it super-comfortable out of the water, too.
Extensive Running Dynamics
When running, this pairing allows your compatible wearable to report 6 running dynamics metrics: cadence, stride length, ground contact time, ground contact time balance, vertical oscillation and vertical ratio.
Example of Typical Uses
HRM-Tri |
HRM-Swim |
Bike rides, runs, bricks |
Pool swims |
Open water swims |
Open water swims |
Triathlon competition (open water swim) |
Triathlon competition (pool swim), triathlon kit not required |
Triathlon competition (with pool swim) while wearing triathlon kit |
Runs or bike rides as part of a multi-sport activity that includes a pool swim |
SPECS:
Physical Specifications
- Unit dimensions (LxWxD): 23.5”-56.0” x 1.2” x 0.5” (60.0 - 142.0 x 3.0 x 1.2 cm)
- Weight: 2.1 oz (59 g)
- Module size: 29.4 x 51.4 x 8.5 mm
- Module weight: 1.7 oz (49 g)
- Size adjustment: Bi-fold
- Sizing range: 23.5”-56.0” (60.0 - 142.0 cm)
- Battery: CR2032
- Battery life: 10 months (Tri training 1 hour per day)
- Water rating: 5 ATM
Additional
- ANT+® heart rate: yes
- Supports heart rate variability and advanced heart rate features: yes
- 2.4 GHz ANT wireless communication protocol: yes
- Running dynamics: yes
- Stores and forwards heart rate: yes
- Swim interval heart rate statistics: yes
- Non-slip design for pool swimming: no
- Pool chemical resistant: no
Compatible Devices:
- D2™ Bravo
- D2™ Charlie
- D2™ Delta
- D2™ Delta PX
- D2™ Delta S
- Descent™ Mk1
- Descent™ Mk2
- Descent™ Mk2i
- Descent™ Mk2S
- Edge® 1000
- Edge® 1030
- Edge® 1030 Plus
- Edge® 130
- Edge® 130 Plus
- Edge® 520
- Edge® 520 Plus
- Edge® 520 Plus
- Edge® 530
- Edge® 530 Mountain Bike Bundle
- Edge® 810
- Edge® 820
- Edge® 830
- Edge® 830 Mountain Bike Bundle
- Enduro™
- epix™ (Gen 2)
- eTrex® 30x
- eTrex® 32x
- eTrex® Touch 35
- fēnix® 3
- fēnix® 3 HR
- fēnix™ 3 Sapphire with Metal Band
- fēnix® 5
- fēnix® 5S
- fēnix® 5S Plus
- fēnix® 5X
- fēnix® 5X Plus
- fēnix® 6
- fēnix® 6 - Pro Solar Edition
- fēnix® 6 Pro and Sapphire
- fēnix® 6S
- fēnix® 6S Pro and Sapphire
- fēnix® 6S Pro Solar
- fēnix® 6X - Pro and Sapphire editions
- fenix® 6X - Pro Solar Edition
- fēnix® 7 – Sapphire Solar Edition
- fēnix® 7 – Solar Edition
- fēnix® 7 – Standard Edition
- fēnix® 7S – Sapphire Solar Edition
- fēnix® 7S – Solar Edition
- fēnix® 7S – Standard Edition
- fēnix® 7X – Sapphire Solar Edition
- fēnix® 7X – Solar Edition
- fēnix® Chronos
- Forerunner® 630
- Forerunner® 735XT
- Forerunner® 745
- Forerunner® 920XT
- Forerunner® 935
- Forerunner® 945
- Garmin Swim™ 2
- GPSMAP® 276Cx
- GPSMAP® 64csx
- GPSMAP® 64s
- GPSMAP® 64st
- GPSMAP® 64sx
- GPSMAP® 65
- GPSMAP® 65s
- GPSMAP® 66i
- GPSMAP® 66s
- GPSMAP® 66sr
- GPSMAP® 66st
- MARQ® Adventurer
- MARQ™ Athlete
- MARQ™ Aviator
- MARQ™ Captain
- MARQ Captain: American Magic Edition
- MARQ® Commander
- MARQ™ Driver
- MARQ® Golfer
- Montana® 610
- Montana® 680t
- Oregon® 700
- Oregon® 750t
- quatix® 5 Sapphire
- quatix® 6
- quatix® 6 Titanium
- quatix® 6x Solar
- Rino® 750
- tactix® Charlie
- tactix® Delta - Sapphire Edition
- tactix Delta - Solar Edition
- tactix Delta - Solar Edition with Ballistics
- VIRB® 360