The Japanese arm of Finnish sports watch brand SUUNTO announced the Suunto Run 2 on September 15, a watch designed specifically for road running and marathon training. The watch body still weighs 35 g, the same as the original, but the display is now roughly three times brighter at 2,000 nits, and free offline maps and dual-band GNSS have been added. It goes on sale September 29, priced at ¥59,950 for the 4 GB model and ¥64,900 for the 64 GB model (both including tax). A chest-strap heart rate sensor, the Suunto Smart Heart Rate Belt 2 (¥19,800 including tax), launches the same day.
What Changed from the Original
The first Suunto Run was a simple running watch whose main selling point was its weight. Run 2 takes the approach of keeping that lightness while adding what was missing. Here are the main differences, based on the comparison table SUUNTO has published.
The display is a 1.32-inch LTPS AMOLED panel. The size is unchanged, but peak brightness rises from 600 nits to 2,000 nits. When you are trying to read pace and heart rate under direct midsummer sun, that difference translates straight into legibility.
Battery capacity grows 29 percent, from 295 mAh to 380 mAh, giving up to 10 days in daily use (8 days on the original) and up to 24 hours in the highest-accuracy GPS mode (20 hours on the original). That comfortably covers a full marathon and even the first half of an ultra.
Positioning moves to new-generation dual-band GNSS, supporting L1/L5 signals from GPS, GLONASS, Galileo, BeiDou and QZSS (Japan's Michibiki). Expect fewer wandering tracks between tall buildings and under elevated roads.
The heart rate sensor is a new 12-channel optical unit that reads the wrist signal through 2.5D curved glass. According to SUUNTO, this improves tracking during intervals, when heart rate rises and falls quickly.
Storage now comes in a 64 GB option alongside 4 GB. If you plan to load both maps and music, 64 GB is the safe choice.
The case measures 46 × 46 × 11.7 mm, just 0.2 mm thicker than the original's 11.5 mm. The stainless steel bezel, Gorilla Glass and 5 ATM water resistance carry over.
Offline Maps at No Extra Cost
The headline feature is free global offline maps, something rarely seen on running watches in this price range. Transfer maps and routes from the Suunto app to the watch before you head out, and you can check your location and the surrounding roads on your wrist even with no signal. On a race course in an unfamiliar city, or when you want to duck down a side street mid-run, not having to pull out your phone is a quietly useful thing. No subscription is required and there is no additional charge for the maps.
Music also plays offline: pair Bluetooth earphones and you can run without carrying a phone.
Showing Your Remaining Energy as a Number
Suunto Run 2 includes EnergySense, which displays a real-time estimate of the load on your body and how much you have left during a race. It gives you data for deciding whether to hold your pace, ease off or push harder, and it also shows a projected finish time if you keep running at your current pace. SUUNTO notes that EnergySense is offered as a beta, and that the timing, supported models and functionality may change.
Marathon mode also includes Ghost Runner, which tracks your gap to a preset target pace. Think of it as racing a virtual pacer: you can see at a glance how far ahead of or behind your target time you currently are.
On the training side, Suunto Coach in the Suunto app is free to use. Tell it your target race (5 km, 10 km, half or full marathon) and how many days and hours you can train, and the AI builds a personalized plan combining easy runs, intervals and long runs. Training load, HRV (heart rate variability), sleep and recovery status are also visible in the app to help you decide whether to run or rest.
Heart Rate Belt 2 Raises Measurement Accuracy
Launching alongside the watch, the Suunto Smart Heart Rate Belt 2 is a chest-strap sensor that captures heart rate and beat-by-beat R-R intervals. It should deliver stable readings in situations where wrist-based optical sensors struggle, such as sharp changes in effort.
Paired with a compatible Suunto watch, it enables ZoneSense, which uses HRV to display your intensity in real time across three zones (aerobic, anaerobic and VO₂max) based on how your body is responding that day. It also records running form metrics such as cadence, ground contact time, vertical oscillation, flight time and left-right contact balance. The belt runs for up to about 460 hours on a replaceable CR2032 battery, stores up to 20 hours of data on board when the connection drops or while swimming, and can connect to up to 3 Bluetooth devices at once.
Pricing and Availability
Suunto Run 2 comes in three colors: All Black, Feather Gold and Aloe Green. The 4 GB model is ¥59,950 and the 64 GB model is ¥64,900, while the Suunto Smart Heart Rate Belt 2 is ¥19,800 (all including tax). Both go on sale September 29 through the SUUNTO official online store, Amazon, Rakuten and other retailers.
Summary
Suunto Run 2 keeps the original's 35 g weight and adds the things people wished it had: a brighter screen, longer battery, dual-band positioning and free offline maps. EnergySense being a beta is worth keeping in mind, but there are not many running watches around ¥60,000 that pack in this much. If you are shopping for a new watch ahead of the autumn marathon season, this one belongs on the shortlist.
