Suunto Race 3S unveiled: What the 56-gram sports watch with AI coach can really do

TVS News AI, editorially supervised, presents Suunto Race 3S unveiled: What the 56-gram sports watch with AI coach can really do.

56 grams in a 46-millimeter case with titanium bezel – and still dual-band GPS for 38 hours. What sounds like a wish list is the spec sheet of the new Suunto Race 3S. The Finnish manufacturer is launching its lightest outdoor sports watch in the Race lineup to date, positioning it directly against the Garmin Forerunner class.

If you train outside a lot, prefer being out on the trail, and don't want to constantly wear a heavy watch on your wrist, the Race 3S is an attempt to combine lightweight design with pro-level features. We've combed through the specs and show what's really inside – and where Suunto still has some explaining to do.

How light the Race 3S really is

The most striking detail first: according to Golem, the Race 3S weighs just 56 grams despite its 46-millimeter case with titanium bezel. That makes it noticeably lighter than most competitors in this class. The display is protected by sapphire glass – a feature you'd normally expect from the top tier of sports watches. The 1.32-inch AMOLED display reaches 2,000 nits according to Tour Magazin and should remain easily readable even in direct sunlight.

38 hours of GPS, 12 days of everyday use

The second key number: in dual-band GPS mode – meaning simultaneous processing of multiple frequency bands for higher accuracy in difficult terrain – the battery lasts up to 38 hours. That should be enough for a long trail run or a multi-day hut-to-hut adventure. In normal everyday use without active GPS, Suunto quotes a runtime of up to twelve days. That puts the Race 3S on par with many current multisport watches, without setting new records.

AI coach and trail strategy

New is the AI-powered coach that Suunto is introducing on the Race 3S. It's designed to analyze training trends, schedule recovery phases, and give tailored recommendations for your next run. On top of that comes a feature called Intelligent Trail Race Strategy, which, according to Suunto, translates elevation gain and distance into a pace recommendation. Comparable approaches can so far be found mainly with Garmin or Polar. How well the Suunto AI coach really performs in everyday use can't be assessed seriously without testing – Suunto itself describes it as a learning function that's meant to improve over time.

Offline maps and over 100 sport profiles

Practical for anyone who runs without a phone: the Race 3S comes with free offline maps including contour lines. Climb Guidance gives you an estimate of how steep it will still get on long ascents and how to pace yourself. In total, over 100 sport profiles are available – from trail running to mountain biking to multisport. For mountain bikers, the watch delivers relevant performance metrics according to MSN, so not just simple tracking, but values you can actually analyze.

499 euros – and who the Race 3S is really for

According to HDSports.at, Suunto is asking 499 euros or 499 Swiss francs for the Race 3S. That puts it on par price-wise with the Garmin Forerunner 965 – though with considerably less established presence in the racing segment. Anyone looking for a lightweight, rugged watch with a real trail focus who's willing to get used to a new software interface gets a well-rounded package here. Those who've long relied on the proven Garmin ecosystem, on the other hand, will need some time to warm up to the Race 3S.