Garmin HRM-Tri Wireless Sensor Black

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Specifically designed for triathletes, the HRM-Tri strap enhances your triathlon experience when paired with a compatible Garmin device. Featuring one of the smallest, lightest heart rate monitors, attached to a soft strap, making it comfortable both in and out of water. 


  • f?nix® 3 HR
  • f?nix™ 3 Sapphire with Metal Band f?nix™ 3 Sapphire with Metal Band
  • D2™ Bravo D2™ Bravo
  • D2™ Charlie D2™ Charlie
  • epix™ epix™
  • f?nix® 3 f?nix® 3
  • f?nix® 5 f?nix® 5
  • f?nix® 5S f?nix® 5S
  • f?nix® 5X f?nix® 5X
  • f?nix® Chronos f?nix® Chronos
  • Forerunner® 235 Forerunner® 235
  • Forerunner® 630 Forerunner® 630
  • Forerunner® 735XT Forerunner® 735XT
  • Forerunner® 935 Forerunner® 935
  • quatix® 3 quatix® 3
  • quatix® 5 quatix® 5
  • quatix® 5 Sapphire quatix® 5 Sapphire
  • tactix® Bravo tactix® Bravo
  • VIRB® 360 VIRB® 360


  • HRM-Tri
  • Strap Extender
  • Manuals


  • Specifically designed for triathletes
  • Smallest and lightest heart rate monitor (HRM)
  • Comfortable, easily adjustable strap
  • Stores and forwards heart rate data to Forerunner® 920XT
  • Reports 6 running dynamics metrics: cadence, stride length, ground contact time, ground contact time balance, vertical oscillation and vertical ratio.


Bike rides, runs, bricksPool swims
Open water swimsOpen water swims
Triathlon competition (open water swim)Triathlon competition (pool swim), triathlon kit not required
Triathlon competition (with pool swim) while wearing triathlon kitRuns or bike rides as part of a multi-sport activity that includes a pool swim




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
ANT+® heart rate: ?
Supports heart rate variability and advanced heart rate features: ?
2.4 GHz ANT wireless communication protocol: ?
Running dynamics: ?
Stores and forwards heart rate: ?
Swim interval heart rate statistics: ?
Non-slip design for pool swimming:?
Pool chemical resistant: ?


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About Garmin

Garmin is a world leader in innovative GPS technology across diverse markets, including automotive, marine, fitness, outdoor recreation and aviation. Garmin pioneered handheld GPS receivers, which were initially used by military personnel in the Gulf War.  A decade later Garmin launched a series of personal GPS devices for fitness called 'Forerunner'. The 'Forerunner' series was at the cutting edge of what is now a well developed market for GPS fitness products, used by recreational and professional athletes alike. In 2008 Garmin launched the Garmin-Sharp cycling teamon the UCI Pro Tour to promote its range of 'Edge' bike computers. Garmin continues to be at the forefront of technology and innovation for GPS products, making a wide range of cycling, multi-sport and running devices.  

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