Garmin
Fenix 9 43mm vs Forerunner 170 Music
Size, specs & wrist fit compared
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Which one fits you
Both need much the same wrist — roughly 45–61mm across the flat of the wrist. Neither will fit where the other won't, so decide on thickness, weight and features instead.
The Fenix 9 43mm and Forerunner 170 Music share a near-identical 43mm case, so wrist presence comes down to thickness, lug-to-lug and weight.
The Forerunner 170 Music is the slimmer of the two (11.9mm vs 13.8mm), so it slides under a cuff more easily.
On the wrist the Forerunner 170 Music feels lighter (41g vs 61g, case only).
Among the 318 43mm watches we hold thickness for, the Fenix 9 43mm is thicker than 70% — it will sit high even though the case width reads modest.
Among the 314 43mm watches we hold thickness for, the Forerunner 170 Music is thinner than 84%, so it wears flatter than its width suggests.
The Fenix 9 43mm is 0.4mm wider, 0.4mm longer, 1.9mm thicker and 20g heavier than the Forerunner 170 Music. Both are circular.
Fenix 9 43mm
Forerunner 170 Music
Case width
43mm
42.6mm−0.4mm
Lug-to-lug
43mm
42.6mm−0.4mm
Thickness
13.8mm
11.9mm−1.9mm
Weight
61g
41g−20g
Switch or add watches
Garmin
Fenix 9 43mm
Garmin
Forerunner 170 Music
Fit tool
Watch Fit Tool
For sports watches, lug-to-lug (L2L) is what matters most — it decides whether a watch overhangs your wrist. Bulky is fine; overhang is not.
Your wrist
mm
≈ 146.9mm aroundDepth
How to Measure Wrist Width
1
Lay your arm flat on a table, palm facing up
2
Measure across the flat top of your wrist (not the circumference)
3
Measure at the point where you wear your watch — typically just below the wrist bone
⚠ Important
Wrist width ≠ circumference. We need the flat width across the top of your wrist where the watch sits, not how far around.
Garmin Fenix 9 43mm
Case 43.0mm · Lug-to-lug 43.0mm · Thickness 13.8mm · 61g
Balanced Fit
43mm on a 55mm wrist
Understated Balanced Sweet Spot Bold Overhang ⚠
Across the wrist it works — 6.0mm spare each side — but a tall watch on this wrist. Fine over a sleeve, awkward under one.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 43mm, so you could go bigger.
How to Measure
- 1. Lay your arm flat, palm up.
- 2. Measure the flat width across the top of your wrist — not the circumference.
- 3. Measure where you wear it, just below the wrist bone.
Against one you know
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. The default: depth about seven tenths of the width. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist6.0mm spare each side
Comfortable, with visible skin either side.
- Off the wrist13.8mm off the skin
A tall watch on this wrist. Fine over a sleeve, awkward under one. (13.8mm case, back against the skin)
- How it seats~4.4mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist61g
Substantial without being a burden — the usual weight of a steel watch on a wrist this size. (1.1g per mm of wrist)
Garmin Forerunner 170 Music
Case 42.6mm · Lug-to-lug 42.6mm · Thickness 11.9mm · 41g
Balanced Fit
42.6mm on a 55mm wrist
Understated Balanced Sweet Spot Bold Overhang ⚠
Comfortably inside the edges of your wrist, and it seats and sits low enough to wear without thinking about it.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 42.6mm, so you could go bigger.
How to Measure
- 1. Lay your arm flat, palm up.
- 2. Measure the flat width across the top of your wrist — not the circumference.
- 3. Measure where you wear it, just below the wrist bone.
Against one you know
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. The default: depth about seven tenths of the width. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist6.2mm spare each side
Comfortable, with visible skin either side.
- Off the wrist11.9mm off the skin
Normal sports-watch height for a wrist this size. (11.9mm case, back against the skin)
- How it seats~4.2mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist41g
Light enough to forget you have it on. (0.7g per mm of wrist)
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
Highlight
- Garmin Fenix 9 43mm43mm · 13.8mm thick
- Garmin Forerunner 170 Music42.6mm · 11.9mm thick
3D preview
Fenix 9 43mm vs Forerunner 170 Music on a wrist
Sized to your own wrist, turned any way you like.
Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.
Battery life compared
Runtime for every power mode either watch publishes, 1 of them directly comparable.
Fenix 9 43mmForerunner 170 Music
Smartwatch
10 days10 days
Specifications
The short version
7 key specs| Spec | GarminFenix 9 43mm | GarminForerunner 170 Music |
|---|---|---|
| Case Width | 43mm | 42.6mm |
| Thickness | 13.8mm | 11.9mm |
| Weight | 61g | 41g |
| Shape | Circular | Circular |
| Display type | AMOLED | AMOLED (optional always-on mode) |
| Battery life | Smartwatch: Up to 10 days Low Power Watch Mode: Up to 15 days Activity Mode (Normal): Up to 18 hours Activity Mode + Music (Normal): Up to 7 hours Activity Mode (Max Battery): Up to 49 hours Activity Mode (Extended Battery): Up to 22 hours Activity Mode (Max Accuracy): Up to 15 hours Expedition Mode: Up to 10 days See Details | Smartwatch mode: Up to 10 days (4 days display always-on) Battery Saver Smartwatch mode: Up to 19 days GPS-Only GNSS mode: Up to 20 hours All-Systems GNSS mode: Up to 14 hours GPS-Only GNSS mode with music: Up to 7.5 hours All-Systems GNSS mode with music: Up to 6.5 hours See Details |
| Released | 2026 | 2026 |
Every specification
390 specs| Spec | Garmin Fenix 9 43mm | Garmin Forerunner 170 Music |
|---|---|---|
| Overview | ||
| Family | Garmin | Garmin |
| General | ||
| Weight | 61 g (case only: 44 g) | 41 g |
| Battery life | Smartwatch: Up to 10 days Low Power Watch Mode: Up to 15 days Activity Mode (Normal): Up to 18 hours Activity Mode + Music (Normal): Up to 7 hours Activity Mode (Max Battery): Up to 49 hours Activity Mode (Extended Battery): Up to 22 hours Activity Mode (Max Accuracy): Up to 15 hours Expedition Mode: Up to 10 days See Details | Smartwatch mode: Up to 10 days (4 days display always-on) Battery Saver Smartwatch mode: Up to 19 days GPS-Only GNSS mode: Up to 20 hours All-Systems GNSS mode: Up to 14 hours GPS-Only GNSS mode with music: Up to 7.5 hours All-Systems GNSS mode with music: Up to 6.5 hours See Details |
| Battery type | Lithium ion | Lithium ion |
| Display Size | 1.3” (33.0 mm) diameter | 1.2" (30.4 mm) diameter |
| Case material | fiber-reinforced polymer with titanium rear cover | — |
| Color display | Yes | Yes |
| Lens material | sapphire crystal | chemically strengthened glass |
| Physical size | 43 x 43 x 13.8 mm Fits wrists with the following circumference: Silicone Band: 108-182 mm UltraFit Band: 108-189 mm Suede Band: 108-175 mm ComfortFit Short: 130-200 mm ComfortFit Long: 150-225 mm | 42.6 x 42.6 x 11.9 mm Fits wrists with a circumference of 126-203 mm |
| Bezel material | titanium | fiber-reinforced polymer |
| Memory/History | 64 GB | 4 GB |
| Strap material | silicone | silicone |
| Charging method | Garmin proprietary plug charger | Garmin proprietary plug charger |
| Large font option | Yes | Yes |
| Display resolution | 416 x 416 pixels | 390 x 390 pixels |
| Built-in speaker/microphone | Yes | — |
| Leakproof inductive buttons | Yes | — |
| QuickFit® watch band compatible | included (20 mm) | — |
| Quick Release bands | — | yes (20 mm, Industry standard) |
| Sensors | ||
| Stocks | Yes | Yes |
| Calendar | Yes | Yes |
| Passcode | Yes | Yes |
| Calculator | Yes | Yes |
| Color shift | Yes | Yes |
| Connectivity | Bluetooth®, ANT+®, Wi-Fi® | Bluetooth®, ANT+®, Wi-Fi® |
| Garmin Share | Yes | Yes |
| Find My Phone | Yes | Yes |
| Sports scores | Yes | — |
| Voice command | Yes | — |
| Evening report | Yes | Yes |
| Morning report | Yes | Yes |
| Red shift mode | Yes | Yes |
| Weather forecasts | Yes | Yes |
| Smart Notifications | Yes | Yes |
| Smart trainer control | Yes | Yes |
| Smartphone compatibility | iPhone®, Android™ | iPhone®, Android™ |
| Controls smartphone music | Yes | Yes |
| On-device Connect IQ™ Store | Yes | Yes |
| Plays and controls watch music | Yes | Yes |
| Find My Phone during GPS activity | Yes | Yes |
| Pairs with Garmin Connect™ Mobile | Yes | Yes |
| Compatible with Garmin Messenger app | Yes | Yes |
| Find My Garmin (helps locate lost device) | Yes | Yes |
| Battery saver (customizable low power watch) | Yes | Yes |
| Bluetooth phone calling and voice assistant support | Yes | — |
| Realtime settings sync with Garmin Connect™ mobile | Yes | Yes |
| View images from notifications on watch (Android™ only) | Yes | Yes |
| Text response/reject phone call with text (Android™ only) | Yes | Yes |
| Connect IQ™ (downloadable watch faces, data fields and apps) | Yes | Yes |
| Hourly alert | — | Yes |
| Color filters | — | Yes |
| Spoken watch face | — | Yes |
| Variant | ||
| Color | Titanium with Fog Gray Silicone Band | Whitestone with Whitestone/Cloud Blue Band |
| Version | fēnix 9 | — |
| Case Size | 43 mm | — |
| Solar Charging | No | — |
| Available Colors | Titanium with Pebble Gray Silicone Band; Titanium with Fog Gray Silicone Band | Whitestone with Whitestone/Cloud Blue Band; Black with Black/Amp Yellow Band; Red Pink with Red Pink/Mango Band ; Teal Green with Teal Green/Citron Band |
| inReach Connectivity (LTE/satellite) | No | — |
| Clock Features | ||
| Sleep | yes (advanced) | yes (advanced) |
| Hydration | yes (in Garmin Connect™ and optional Connect IQ™ widget) | yes (in Garmin Connect™ and optional Connect IQ™ widget) |
| Breathwork | Yes | Yes |
| Meditation | Yes | Yes |
| Fitness age | Yes | Yes |
| Sleep coach | Yes | Yes |
| Health status | Yes | Yes |
| Nap detection | Yes | Yes |
| All-day stress | Yes | Yes |
| Women's health | yes (in Garmin Connect™ and optional Connect IQ™ widget) | yes (in Garmin Connect™ and optional Connect IQ™ widget) |
| Health snapshot | Yes | Yes |
| Jet lag adviser | Yes | — |
| Sleep alignment | Yes | — |
| Respiration rate | Yes | Yes |
| Skin temperature | Yes | — |
| Lifestyle logging | Yes | Yes |
| Resting heart rate | Yes | Yes |
| Breathing variations | Yes | Yes |
| Past ovulation estimates | Yes | — |
| Abnormal heart rate alerts | yes (high and low) | yes (high and low) |
| Relaxation breathing timer | Yes | Yes |
| Body Battery™ energy monitor | Yes | Yes |
| Heart rate (constant, every second) | Yes | Yes |
| Relaxation reminders | — | Yes |
| Diving Features | ||
| Indoor rowing max heart rate | Yes | — |
| Indoor rowing FTP (requires compatible rower) | Yes | — |
| Indoor rowing VO2 max (requires compatible rower) | Yes | — |
| Indoor rowing lactate threshold (requires compatible rower) | Yes | — |
| Indoor rowing power curve/zones (requires compatible rower) | Yes | — |
| Gaming Features | ||
| PO2 | up to 1.6 with customizable Deco settings | — |
| Tides | Yes | — |
| Backlight | yes (configurable intensity; always on) | — |
| Gas mixes | Air, Nitrox (21-40% Oxygen) | — |
| APNEA mode | Yes | — |
| Deep Stops | yes (using custom Gradient Factors) | — |
| No fly time | Yes | — |
| Safety Stop | yes (customizable off/3min/5min) | — |
| Dive planner | yes (Basic NDL & Gas Planner) | — |
| Nitrox support | Yes | — |
| Single-gas mode | Yes | — |
| Alerts and alarms | yes (vibration only) | — |
| 3-axis dive compass | yes with adjustable heading, quick change to 90R, 90L, and Reciprocal. Indicates degrees and direction back to set heading. | — |
| Auto start/end dive | Yes | — |
| Decompression model | Bühlmann ZHL-16c with Gradient Factors | — |
| Missed Deco Lockout | yes (can be disabled prior to dive with user acknowledgement) | — |
| Custom end-dive timeout | yes (20 sec to 10 min) | — |
| Customizable conservatism | yes (Low/Medium/High) | — |
| Surface diver status widget | yes (Surface Interval, no fly time, N2 loading, CNS, OTU, and Tissue Compartment status) | — |
| Automatic altitude adjustment | Yes | — |
| Dive ascent/descent rate indicator | Yes | — |
| Dive activity maximum operating depth | 40 meters | — |
| Sync dive log to Garmin Dive™ Mobile app | Yes | — |
| Automatically saves dive entry and exit locations | Yes | — |
| Rowing Features | ||
| Wearable trolling motor remote | Yes | — |
| Boating Features | ||
| TrueUp™ | Yes | — |
| Move IQ™ | Yes | — |
| Step counter | Yes | — |
| Floors climbed | Yes | — |
| Calories burned | Yes | — |
| Distance traveled | Yes | — |
| Intensity minutes | Yes | — |
| Automatic rep counting | Yes | — |
| Garmin Connect™ Challenges app | yes (optional Connect IQ app) | — |
| Move alerts (displays on device after a period of inactivity) | Yes | — |
| Auto goal (learns your activity level and assigns a daily step goal) | Yes | — |
| Cycling Features | ||
| Pool swim workouts | Yes | Yes |
| Critical swim speed | Yes | — |
| Time and distance alerts | Yes | Yes |
| Auto rest (pool swim only) | Yes | Yes |
| Drill logging (pool swim only) | Yes | Yes |
| Pacing alerts (pool swim only) | Yes | — |
| Countdown start (pool swim only) | Yes | Yes |
| Underwater wrist-based heart rate | Yes | Yes |
| "Repeat on" rest timer (pool swim only) | Yes | Yes |
| Basic rest timer (up from 0) (pool swim only) | Yes | Yes |
| Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only) | Yes | Yes |
| Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories) | Yes | Yes |
| Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories) | Yes | Yes |
| Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim) | yes (with compatible HRM) | Yes |
| Golfing Features | ||
| Tides | Yes | — |
| Auto rest | Yes | — |
| Sight 'N Go | Yes | — |
| Tide glance | Yes | — |
| Fish forecast | Yes | — |
| UltraTrac mode | Yes | — |
| Vertical speed | Yes | — |
| GPS coordinates | Yes | — |
| Elevation profile | Yes | — |
| Projected waypoint | Yes | — |
| Total ascent/descent | Yes | — |
| Future elevation plot | Yes | — |
| Distance to destination | Yes | — |
| Expedition GPS Activity | Yes | — |
| Sun and moon information | Yes | — |
| Rest Timer (Ultra Run only) | Yes | — |
| Barometric trend indicator with storm alert | Yes | — |
| Running Features | ||
| PinPointer | Yes | — |
| Swing Tempo | Yes | — |
| Custom targets | Yes | — |
| Tempo Training | Yes | — |
| Virtual caddie | Yes | — |
| Full vector map | Yes | — |
| Handicap scoring | Yes | — |
| Tournament legal | Yes | — |
| Digital scorecard | Yes | — |
| Garmin AutoShot™ | Yes | — |
| PlaysLike distance | Yes | — |
| Round timer/odometer | Yes | — |
| Auto CourseView updates | Yes | — |
| Yardage to layups/doglegs | Yes | — |
| Hazards and course targets | Yes | — |
| Pairs with Garmin Golf app | Yes | — |
| Green View with manual pin position | Yes | — |
| Preloaded with 43,000 courses worldwide | Yes | — |
| Green Contours (with Garmin Golf membership) | Yes | — |
| CT1 Automatic club tracking compatible (requires accessory) | Yes | — |
| CT10 Automatic club tracking compatible (requires accessory) | Yes | — |
| Yardage to F/M/B (distance to front, middle and back of green) | Yes | — |
| Stat tracking (strokes, putts per round, greens and fairways hit) | Yes | — |
| Wind speed and direction (requires connection to Garmin Golf app) | Yes | — |
| Touch-targeting (touch target on display to see the distance to any point) | Yes | — |
| Measures shot distance (calculates exact yardage for shots from anywhere on course) | automatic | — |
| Auto rest | — | Yes |
| UltraTrac mode | — | Yes |
| Vertical speed | — | Yes |
| Elevation profile | — | Yes |
| Total ascent/descent | — | Yes |
| Future elevation plot | — | Yes |
| Distance to destination | — | Yes |
| Sun and moon information | — | Yes |
| Rest Timer (Ultra Run only) | — | Yes |
| What You'll Love | ||
| Timer | Yes | Yes |
| Stopwatch | Yes | Yes |
| Time/date | Yes | Yes |
| Alarm clock | Yes | Yes |
| Touchscreen | Yes | Yes |
| Display type | AMOLED | AMOLED (optional always-on mode) |
| Water rating | 10 ATM | 5 ATM |
| GPS Time Sync | Yes | Yes |
| Garmin Pay™ | Yes | Yes |
| Music storage | Yes | Yes |
| Garmin ECG App | Yes | — |
| LED flashlight | Yes | — |
| Multi-band GPS | Yes | — |
| Training status | Yes | Yes |
| Built-in mapping | Yes | — |
| Smart wake alarm | Yes | Yes |
| Training readiness | Yes | Yes |
| Sunrise/sunset times | Yes | Yes |
| Pulse Ox blood oxygen | Yes | yes (spot-check, and optional all-day and in sleep) |
| Sleep score and insights | Yes | Yes |
| Automatic daylight saving time | Yes | Yes |
| Battery life (smartwatch mode) | Up to 10 days | Up to 10 days |
| Make calls and send texts via voice | Yes | — |
| Activity Profiles | ||
| Assistance | Yes | Yes |
| Live Event Sharing | Yes | Android™ Only |
| Incident Detection during select activities | Yes | Yes |
| Incident detection alert on phone for wearables | Yes | Yes |
| Tactical Features | ||
| Gaming Activity | Yes | — |
| GameOn™ app compatible | Yes | — |
| Outdoor Recreation | ||
| Up Ahead | Yes | Yes |
| TracBack® | Yes | Yes |
| Back to start | Yes | Yes |
| Explore Nearby | Yes | — |
| Perspective view | Yes | — |
| NextFork™ navigation | Yes | — |
| Point-to-point navigation | Yes | Yes |
| Preloaded ski resort maps | Yes | — |
| ClimbPro™ Ascent Planner | Yes | — |
| Preloaded road and trail maps | Yes | — |
| Bread crumb trail in real time | Yes | Yes |
| Downloadable cartography support | Yes | — |
| Daily Smart Features | ||
| HIIT workouts | Yes | Yes |
| Yoga workouts | Yes | Yes |
| Cardio workouts | Yes | Yes |
| Pilates workouts | Yes | Yes |
| Rucking workouts | Yes | — |
| Strength workouts | Yes | Yes |
| Multisport workouts | Yes | — |
| Garmin Cycling Coach | Yes | Yes |
| Garmin Running Coach | Yes | Yes |
| Garmin Triathlon Coach | Yes | — |
| Garmin Coach - Strength | Yes | Yes |
| Mixed session multisport | Yes | — |
| Garmin Running Coach Experts | Yes | Yes |
| On-screen workout animations | Yes | — |
| On-screen workout muscle maps | Yes | Yes |
| Garmin Coach - Prebuilt Cycling Plans | Yes | Yes |
| Grade-adjusted pace based workouts (running) | Yes | — |
| Daily Suggested Workout - Cycling (Pace and Heart Rate Based) | Yes | — |
| Daily Suggested Workout - Running (Pace and Heart Rate Based) | Yes | Yes |
| Garmin fitness coach | — | Yes |
| Mapping & Navigation | ||
| Courses | Yes | Yes |
| Power guide | Yes | — |
| MTB Grit & Flow | Yes | — |
| Race an activity | Yes | Yes |
| Power meter compatible | Yes | Yes |
| Advanced cycling dynamics | Yes | — |
| Power curve and % FTP workouts | Yes | — |
| Compatible with Varia™ lights | Yes | Yes |
| FTP (Functional Threshold Power) | yes (with compatible accessory) | — |
| Compatible with Varia headlight camera | Yes | Yes |
| Speed and cadence sensor support (w/sensor) | Yes | Yes |
| Cycle Map (routable cycling-specific street map) | Yes | — |
| Bike lap and lap maximum power (with power sensor) | Yes | Yes |
| Compatible with Varia™ radar (rear-facing radar) | Yes | Yes |
| Compatible with Vector™ and Rally™ (power meters) | Yes | Yes |
| Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories) | Yes | Yes |
| Activity Tracking Features | ||
| % HRR | Yes | Yes |
| % HR max | Yes | Yes |
| HR zones | Yes | Yes |
| HR alerts | Yes | Yes |
| Shortcuts | Yes | Yes |
| HRV status | Yes | Yes |
| Load ratio | Yes | Yes |
| Manual lap | Yes | Yes |
| Rest timer | Yes | Yes |
| Auto max HR | Yes | Yes |
| Auto scroll | Yes | — |
| Finish time | Yes | Yes |
| Garmin Epic | Yes | — |
| HR calories | Yes | Yes |
| Voice alerts | Yes | Yes |
| Custom alerts | Yes | Yes |
| Physio TrueUp | Yes | Yes |
| Recovery time | Yes | Yes |
| Training load | Yes | Yes |
| VO2 Max (Run) | Yes | Yes |
| Course guidance | Yes | Yes |
| Endurance score | Yes | — |
| Training effect | Yes | Yes |
| Virtual Partner | Yes | — |
| Workout benefit | Yes | — |
| Race an Activity | Yes | Yes |
| Realtime stamina | Yes | — |
| Advanced workouts | Yes | Yes |
| Interval training | Yes | Yes |
| Race glance/widget | Yes | Yes |
| Training load focus | Yes | Yes |
| VO2 Max (Trail Run) | Yes | Yes |
| Garmin Live Segments | Yes | — |
| Strava Live Segments | Yes | — |
| GPS speed and distance | Yes | Yes |
| Configurable lap alerts | Yes | Yes |
| Customizable data pages | Yes | Yes |
| Unified training status | Yes | Yes |
| Touch and/or button lock | Yes | Yes |
| Activity history on watch | Yes | Yes |
| Multisport auto transition | Yes | — |
| Downloadable training plans | Yes | Yes |
| Training effect (anaerobic) | Yes | Yes |
| Manual multisport activities | Yes | — |
| HRM running pace and distance | Yes | Yes |
| Heat and altitude acclimation | Yes | — |
| Customizable activity profiles | Yes | Yes |
| Trendline™ Popularity Routing | Yes | — |
| Auto Pause® automatic timer halt | Yes | Yes |
| Respiration rate (during exercise) | yes (with compatible accessory) | yes (with compatible accessory) |
| Auto Lap® interval tracking feature | Yes | Yes |
| Primary benefit (Training Effect labels) | Yes | Yes |
| Round-trip course creator (running/cycling) | Yes | — |
| Power Modes - customizable in-activity battery settings | Yes | — |
| HR broadcast (broadcasts HR data over ANT+® to paired devices) | Yes | Yes |
| Improved interval (includes open repeats, intervals data page, rest screen and auto detection) | Yes | Yes |
| HRV stress test (measures your heart rate variability while standing still, for 3 minutes, to provide you with an estimated stress level; the scale of this is 1 to 100; low scores indicate lower stress levels) | yes (with compatible accessory) | — |
| Workout and Training Plans | ||
| Gym | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Jump Roping | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping,, Floor Climbing, Indoor Rowing, Jump Roping |
| Dive | Scuba Diving (single gas), Apnea Diving | — |
| Swim | Pool Swimming, Open Water Swimming | Pool Swimming, Open Water Swimming |
| Cycling | Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX | Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross |
| Wellness | Walking, Pilates, Yoga, Indoor Walking, Mobility | Walking, Pilates, Yoga , Indoor Walking, Mobility, Meditation, Breathwork |
| Multisport | Swimming/Running, Triathlon | — |
| In the ring | Boxing, Mixed Martial Arts | Boxing, Mixed Martial Arts |
| Team sports | Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball | Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball |
| Motor sports | Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling | Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling |
| On the water | Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Sailing, Water Skiing, Wakeboarding, Wakesurfing, Tubing, Snorkeling, Whitewater | Stand Up Paddleboarding, Rowing, Kayaking, Snorkeling |
| Racket sports | Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball | Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball |
| Indoor running | Treadmill Running, Indoor Track Running, Virtual Running | Treadmill Running, Indoor Track Running, Virtual Running |
| Outdoor running | Running, Outdoor Track Running, Trail Running, Ultra Running, Obstacle Racing | Running, Outdoor Track Running, Trail Running, Ultra Running, Obstacle Racing |
| Snow and winter | Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, XC Skate Skiing, Backcountry Skiing, Ice Skating, Snowshoeing | Skiing, Snowboarding, XC Classic Skiing, XC Skate Skiing, Ice Skating, Snowshoeing |
| Outdoor recreation | Hiking, Rucking, Indoor Climbing, Bouldering, Mountaineering, Hunting, Horseback Riding, Golfing, Disc Golf, ArcheryX | Hiking, Rucking, Mountaineering, Horseback Riding, Disc Golf, Archery |
| Other activity profiles | Inline Skating | Inline Skating |
| Health & Wellness Monitoring | ||
| GPS | Yes | Yes |
| QZSS | Yes | — |
| BeiDou | Yes | — |
| Compass | Yes | Yes |
| GLONASS | Yes | Yes |
| Galileo | Yes | Yes |
| Gyroscope | Yes | Yes |
| Thermometer | Yes | Yes |
| Depth sensor | yes (to 40 m) | — |
| Accelerometer | Yes | Yes |
| SatIQ™ Technology | Yes | — |
| Ambient light sensor | Yes | Yes |
| Barometric altimeter | Yes | Yes |
| Pulse Ox Blood Oxygen Saturation Monitor | Yes | Yes |
| Garmin Elevate™ wrist heart rate monitor | Yes | Yes |
| Safety and Tracking Features | ||
| Dual grid coordinates | Yes | — |
| TrueUp™ | — | Yes |
| Move IQ™ | — | Yes |
| Step counter | — | Yes |
| Floors climbed | — | Yes |
| Calories burned | — | Yes |
| Distance traveled | — | Yes |
| Intensity minutes | — | Yes |
| Automatic rep counting | — | Yes |
| Move Alert movement options | — | Yes |
| Garmin Connect™ Challenges app | — | yes (optional Connect IQ app) |
| Move alerts (displays on device after a period of inactivity) | — | Yes |
| Auto goal (learns your activity level and assigns a daily step goal) | — | Yes |
| Training, Planning and Analysis Features | ||
| Hill score | Yes | — |
| Run workouts | Yes | Yes |
| Running power | Yes | Yes |
| Race predictor | Yes | Yes |
| Running Economy | yes (with compatible accessory) | — |
| Step speed loss | yes (with compatible accessory) | — |
| Foot pod capable | Yes | Yes |
| Running dynamics | Yes | Yes |
| Lactate threshold | Yes | — |
| Running Tolerance | Yes | — |
| Grade-adjusted pace | Yes | Yes |
| Trail run auto climb | Yes | — |
| Performance condition | Yes | — |
| Run/Walk/Stand detection | Yes | Yes |
| Stride length (real time) | Yes | Yes |
| PacePro™ Pacing Strategies | Yes | Yes |
| Projected race time and pace | Yes | — |
| Vertical oscillation and ratio | Yes | Yes |
| Ground contact time and balance | yes (GCT balance with accessory) | yes (GCT balance with accessory) |
| GPS-based distance, time and pace | Yes | Yes |
| Course- and weather-specific race predictor | Yes | Yes |
| Cadence (provides real-time number of steps per minute) | Yes | Yes |
| Quick workout | — | Yes |
Wrist Fit
Garmin Fenix 9 43mm
Sits best on wrists ~45–61mm wide (≈ 12.0–16.3cm circumference).
Garmin Forerunner 170 Music
Sits best on wrists ~45–61mm wide (≈ 12.0–16.3cm circumference).
Frequently Asked Questions
Is the Garmin Fenix 9 43mm bigger than the Garmin Forerunner 170 Music?
The Garmin Fenix 9 43mm is bigger — 43mm vs 42.6mm case width.
Which fits a smaller wrist better, the Garmin Fenix 9 43mm or the Garmin Forerunner 170 Music?
The Garmin Fenix 9 43mm suits wrists around 45–61mm wide, and the Garmin Forerunner 170 Music around 45–61mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Garmin Fenix 9 43mm and Garmin Forerunner 170 Music side by side at true scale?
Yes — the schematics and photos above show both watches at matched scale, and our fit tool overlays each on your wrist width.