Garmin Forerunner 165 vs Instinct 3 50mm AMOLED Tactical Edition
Size, specs & wrist fit compared
Which one fits you
Under 18 cm (7.1 in) round, the Instinct 3 50mm AMOLED Tactical Edition's lugs overhang and the Forerunner 165's do not; the Forerunner 165 fills the wrist at 16–18 cm, the Instinct 3 50mm AMOLED Tactical Edition at 19–21 cm.
What else differs
- Screen: the Instinct 3 50mm AMOLED Tactical Edition has the larger screen, 1.3 in across against 1.2 in on the Forerunner 165.
- Battery: 24 days for the Instinct 3 50mm AMOLED Tactical Edition against 11 days for the Forerunner 165 in everyday use; 40 hours for the Instinct 3 50mm AMOLED Tactical Edition against 19 hours for the Forerunner 165 with GPS on.
2.8mm thinner, the Forerunner 165 is the one that slides under a shirt cuff.
The Instinct 3 50mm AMOLED Tactical Edition is 7mm wider, 2.8mm thicker and 20g heavier than the Forerunner 165.
Forerunner 165
Instinct 3 50mm AMOLED Tactical Edition
Case width
43mm
50mm+7mm
Thickness
11.6mm
14.4mm+2.8mm
Weight
39g
59g+20g
Forerunner 165 or Instinct 3 50mm AMOLED Tactical Edition by wrist size
| Wrist round (mm left each side) | Forerunner 165≈49.5mm lug to lug, est. | Instinct 3 50mm AMOLED Tactical Edition≈57.5mm lug to lug, est. |
|---|---|---|
| 14 cm / 5.5 in | Overhangs (2.2mm over) | Overhangs (6.2mm over) |
| 15 cm / 5.9 in | Overhangs (0.6mm over) | Overhangs (4.6mm over) |
| 16 cm / 6.3 in | Bold (1.1mm) | Overhangs (2.9mm over) |
| 17 cm / 6.7 in | Sweet spot (2.7mm) | Overhangs (1.3mm over) |
| 18 cm / 7.1 in | Sweet spot (4.3mm) | Bold (0.3mm) |
| 19 cm / 7.5 in | Balanced (5.9mm) | Sweet spot (1.9mm) |
| 20 cm / 7.9 in | Balanced (7.5mm) | Sweet spot (3.5mm) |
Switch or add watches
Garmin
Forerunner 165
Garmin
Instinct 3 50mm AMOLED Tactical Edition
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Battery life compared
Forerunner 165Instinct 3 50mm AMOLED Tactical Edition
Battery saver
20 days30 daysSmartwatch
11 days24 daysExpedition
—20 daysMax battery GPS
—86 hoursGPS only
19 hours40 hoursAll systems
17 hours32 hoursAll systems + multi-band
—30 hours
More comparisons
2D Dimension Schematics
- Garmin Forerunner 165 43mm × ≈49.5mm (est.) · 11.6mm thick
- Garmin Instinct 3 50mm AMOLED Tactical Edition 50mm × ≈57.5mm (est.) · 14.4mm thick
3D preview
Forerunner 165 vs Instinct 3 50mm AMOLED Tactical Edition on a wrist
Specifications
The short version
7 key specs| Spec | GarminForerunner 165 | GarminInstinct 3 50mm AMOLED Tactical Edition |
|---|---|---|
| Case Width | 43mm | 50mm |
| Thickness | 11.6mm | 14.4mm |
| Weight | 39g | 59g |
| Shape | Circular | Circular |
| Display type | AMOLED (optional always-on mode) | AMOLED (always-on) |
| Battery life | Smartwatch mode: Up to 11 days Battery Saver Smartwatch mode: Up to 20 days GPS-Only GNSS mode: Up to 19 hours All-Systems GNSS mode: Up to 17 hours See Details | Smartwatch: Up to 24 days (9 days always-on) Battery Saver Watch Mode: Up to 30 days GPS Only: Up to 40 hours All Satellite Systems: Up to 32 hours All Satellite Systems + Multi-Band: Up to 30 hours* Max Battery GPS: Up to 86 hours Expedition GPS: Up to 20 days *assuming typical use with SatIQ technology |
| Released | 2024 | 2025 |
Where the specifications differ
25 differences| Spec | Garmin Forerunner 165 | Garmin Instinct 3 50mm AMOLED Tactical Edition |
|---|---|---|
| General | ||
| Battery life | Smartwatch mode: Up to 11 days Battery Saver Smartwatch mode: Up to 20 days GPS-Only GNSS mode: Up to 19 hours All-Systems GNSS mode: Up to 17 hours See Details | Smartwatch: Up to 24 days (9 days always-on) Battery Saver Watch Mode: Up to 30 days GPS Only: Up to 40 hours All Satellite Systems: Up to 32 hours All Satellite Systems + Multi-Band: Up to 30 hours* Max Battery GPS: Up to 86 hours Expedition GPS: Up to 20 days *assuming typical use with SatIQ technology |
| Display Size | 1.2" (30.4 mm) diameter | 1.3" (33 mm) diameter |
| Lens Material | chemically strengthened glass | Chemically Strengthened Glass |
| Bezel Material | fiber-reinforced polymer | fiber-reinforced polymer/aluminum |
| Display resolution | 390 x 390 pixels | 416 x 416 pixels |
| Product Info | ||
| Main SKU | 010-02863-20 | 010-03020-50 |
| Product ID | 1055469 | 1718241 |
| Product Name | Forerunner® 165 | Instinct® 3 – 50 mm, AMOLED, Tactical Edition |
| Release Date | 2/20/2024 | 4/26/2025 |
| Product Variation | Black/Slate Gray | Black with Black Band |
| Running Features | ||
| Ground contact time and balance | yes (but not balance) | yes (GCT balance with accessory) |
| What You'll Love | ||
| Display type | AMOLED (optional always-on mode) | AMOLED (always-on) |
| Water rating | 5 ATM | 10 ATM |
| Pulse Ox blood oxygen | yes (spot-check, during sleep, all day) | Yes |
| Battery life (smartwatch mode) | Up to 11 days | Up to 24 days (9 days always-on) |
| Activity Profiles | ||
| Gym | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing |
| Cycling | Biking, Indoor Biking | Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX |
| Wellness | Walking, Pilates, Yoga, Indoor Walking | Walking, Indoor Walking, Pilates, Yoga |
| Racket sports | Tennis, Pickleball, Padel | Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball |
| Outdoor running | Running, Outdoor Track Running, Trail Running, Ultra Running | Running, Outdoor Track Running, Trail Running, Obstacle Racing |
| Outdoor recreation | Hiking | Hiking, Rucking, Indoor Climbing, Bouldering, Climbing, Hunting, Horseback Riding, Golfing, Disc Golf, Archery |
| Outdoor Recreation | ||
| Area calculation | yes (via Connect IQ™) | Yes |
| Sun and moon information | yes (via Connect IQ™) | Yes |
| Safety and Tracking Features | ||
| Live Event Sharing | Android™ Only | Yes |
| Training, Planning and Analysis Features | ||
| Respiration rate (during exercise) | Yoga and Breathwork only | yes (with compatible accessory) |
The other 154 specifications both list are identical.
Full Garmin Forerunner 165 specifications →Full Garmin Instinct 3 50mm AMOLED Tactical Edition specifications →