Garmin HRM Tri
Garmin HRM Tri
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Garmin HRM Tri

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 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 



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 

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 
  • 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