Garmin HRM-TRI is a heart rate monitor strap for triathlons. The strap fits your chest extremely comfortably and has a soft silicone border on the sensors, so that it keeps in place when you swim, bike, or run. The connector is fixed to the strap, and by pulling the blue plastic disc off, you can easily change the battery.

The strap works both for swimming, biking, and running. For swimming, the strap collects and stores the data till you have finished. Afterwards it uploads the heart rate data to your watch, so that you can read it in Garmin Connect or on the watch.

Garmin HRM-TRI also has Running Dynamics, which helps to optimize your run. The strap measures your vertical distance, cadence, time of ground contact, right/left balance, step length, and verticality. All of this is great as a tool to improve your running style.

The strap is well-suited for triathlon training and racing where you wear the strap underneath a wetsuit or swimsuit. If you need to measure your heart rate when you exercise in a pool, then you should get Garmin HRM-SWIM instead.

WHAT YOU GET WITH GARMIN HRM-TRI

• Garmin HRM-TRI heart rate monitor strap
• Strap extender
• Quick guide

COMPATIBLE WITH:

• D2™ Bravo
• epix™
• fēnix® 3
• fēnix® 3 HR
• fēnix® 3 Sapphire
• fēnix® Chronos
• fēnix® 5 collection
• fēnix® 5 Plus collection
• fēnix® 6 collection
• Forerunner® 645
• Forerunner® 645 Music
• Forerunner® 735XT
• Forerunner® 920XT
• Forerunner® 935
• Forerunner® 945
• quatix® 3
• tactix® Bravo

Running Dynamics is only compatible with Garmin Forunner 735XT, Forunner 920XT,  Forerunner 935, Forerunner 945, Forerunner 620, Fenix 3, the Fenix 5 collection, the Fenix 5 Plus collection, and Garmin Epix