Suunto Launches Lightweight Race 3S Smartwatch
The new 37-gram wearable offers runners a high-brightness display and expanded health-tracking sensor hardware.
Updated on Oct. 15, 2026 in Running
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Suunto has introduced the Race 3S, a new trail running smartwatch featuring a high-brightness AMOLED display and an array of health-tracking sensors. The device will be available in global markets starting in October 2026.
Why it matters
For runners and endurance athletes, the integration of specialized tracking hardware and a lightweight, durable design represents a new option for monitoring physiological metrics during exercise. The device adds to the growing array of wearables designed for tracking performance data in varied outdoor conditions.
The device features a hardware array of 6 LEDs and 4 photodetectors for health tracking, which is being marketed to support over 100 sports modes. The specific clinical accuracy of this sensor configuration remains to be independently validated.
The players
Suunto
A manufacturer specializing in sports watches, dive computers, and precision instruments for outdoor activities.
The details
The Suunto Race 3S utilizes a 2,000-nit AMOLED display protected by sapphire glass to maintain visibility in outdoor lighting. Weighing 37 grams with an 11 mm thick case, the watch is designed for a low profile and features 5 ATM water resistance. Users control the interface through a combination of a touchscreen, a crown, and two side buttons, with an optional chest strap pairing available for those prioritizing heart rate measurement accuracy.
Timeline
October 15, 2026: The watch launches in China and EMEA.
October 29, 2026: The watch launches in North America and APAC.
Health Landscape
This release continues the broader trend of integrating high-resolution displays and complex sensor arrays into lightweight athletic wearables. The Suunto Race 3S sits within an evolving market where performance tracking is increasingly shifting toward high-frequency biometric data collection.
Athletes considering this device should note that while built-in sensors provide continuous data, pairing an optional heart rate chest strap can improve accuracy during high-intensity intervals. Always verify if new tracking tools provide data that is actionable for your specific training goals with your doctor.
The takeaway
The Race 3S offers a specialized set of tracking features for runners, including refined sensor hardware in a lightweight frame. When monitoring heart rate or recovery, consider which measurement method—wrist-based optical or chest-based electrical—best aligns with your specific intensity levels.
Further reading
For more information on selecting athletic equipment, visit our guide on Running.
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Is now a good time for you to upgrade to a high-end GPS fitness smartwatch?
