Garmin Forerunner 165 vs 255 – Check Which One Is Best & Why?

Garmin Forerunner 255 & Garmin Forerunner 165 share many similarities, but there are also important differences, such as quality, performance, features, design, and connectivity. If you want the best one between them, I Would recommend the Garmin Forerunner 255 rather than the Garmin Forerunner 165.

Table Of Contents hide

1 Why Do I Recommend The Garmin Forerunner 255?

2 Side By Side Comparison

3 What Common Both Can Do?

4 Common Features

Why Do I Recommend The Garmin Forerunner 255?

The Garmin Forerunner 255 features dual-band GNSS for more precise location tracking in dense urban and forested environments, whereas the Garmin Forerunner 165 supports only single-band GPS.
Garmin Forerunner 255 includes a full triathlon and multisport mode for athletes who transition between swim, bike, and run disciplines seamlessly, while the Garmin Forerunner 165 lacks dedicated triathlon or automatic transition support.
It comes with advanced training metrics like Training Load, Training Status, and Performance Condition to guide structured workouts and recovery, while the Garmin Forerunner 165 provides only basic training effect and recovery data.
The Garmin Forerunner 255 supports cycling power meter compatibility for measuring watt-based cycling performance, whereas the Garmin Forerunner 165 does not support external cycling power sensors.
Garmin Forerunner 255 includes ClimbPro and PacePro features to assist with pacing strategies and gradient-based efforts during races, while the Garmin Forerunner 165 does not include these navigation-based performance tools.
It provides up to 14 days of battery life in smartwatch mode and 30 hours in GPS mode for extended training and travel use, while the Garmin Forerunner 165 lasts around 11 days in smartwatch mode and 19 hours in GPS mode.
Garmin Forerunner 255 uses a durable transflective MIP display for superior outdoor visibility and lower power consumption, compared to the Garmin Forerunner 165’s AMOLED display.

Maybe the Garmin Forerunner 165 price can make you comfortable because it’s a little bit cheaper than the Garmin Forerunner 255. But you have to compromise all the above-mentioned features. Now the Decision is Yours. I hope it was helpful to choose the right one.

Check Forerunner 255 Best Price

Check Forerunner 165 Best Price

Side By Side Comparison

Feature	Garmin Forerunner 255	Garmin Forerunner 165
Display type	MIP	AMOLED
Touch input	Buttons only	Touchscreen + buttons
GNSS bands	Multi-band	Single-band
GNSS modes	All Systems + Multi-Band	All Systems
Multisport/triathlon	Yes	No
Open-water swim	Yes	No
PacePro	Yes	No
ClimbPro (courses)	Yes	No
Real-Time Stamina	Yes	No
Cycling power meter	ANT+/BLE supported	Not supported
Golf mode	Yes	No
“Up Ahead” (course cues)	Yes	No
Battery (GPS)	~30 hrs	~19 hrs
Battery (multi-band GPS)	~16–20 hrs	N/A
Battery (smartwatch)	~14 days	~11 days
Price	Check Forerunner 255 Price	Check Forerunner 165 Price

What Common Both Can Do?

GPS Tracking: Both watches provide precise GPS tracking, allowing runners and athletes to map routes, monitor distance, and analyze pace accurately during workouts or races.
Heart Rate Monitoring: Each model features wrist-based optical heart rate sensors, continuously tracking heart performance for training zones, rest analysis, and health insights.
SpO2 Sensor: Both devices include pulse oximetry to measure blood oxygen saturation levels, helping users monitor recovery, sleep quality, and altitude adaptation.
Sleep Tracking: Each watch automatically tracks sleep stages—light, deep, and REM—offering detailed sleep insights for better recovery and daily readiness.
Stress Tracking: Both models track stress levels throughout the day using heart rate variability, helping users identify periods of high tension and promote relaxation.
Wrist-Based Heart Rate: Each provides continuous wrist heart rate tracking without needing an external chest strap, ensuring comfort and convenience.
Water Resistance (5 ATM): Both are rated for 5 ATM water resistance, suitable for swimming, showering, and general waterproof usage.
Bluetooth Connectivity: Both connect via Bluetooth to smartphones for data syncing, app notifications, and activity uploads to Garmin Connect.
Smartphone Notifications: Each displays call, text, and app alerts directly on the wrist, keeping users connected during activities.
Music Playback (Music Version): Both have “Music” variants that allow users to download and play songs directly from the watch without a phone.
Garmin Pay: Both support Garmin’s contactless payment system, enabling secure transactions on the go without carrying a wallet.
Women’s Health Tracking: Each model includes menstrual and pregnancy tracking tools, integrating with Garmin Connect for detailed cycle data.
Custom Workouts: Both allow users to create and load custom workouts tailored to training goals or race preparation.
Recovery Time: Each calculates post-workout recovery recommendations, helping athletes plan optimal rest before the next session.
Training Effect: Both measure aerobic and anaerobic training effect, indicating how each session improves endurance and performance.
Interval Workouts: Both support structured interval training, allowing athletes to program precise sets for high-intensity training efficiency.

Check Forerunner 255 Best Price

Check Forerunner 165 Best Price

Common Features

Feature	Garmin Forerunner 255	Garmin Forerunner 165
GPS Tracking	Yes	Yes
Heart Rate Monitoring	Yes	Yes
SpO2 Sensor	Yes	Yes
Sleep Tracking	Yes	Yes
Stress Tracking	Yes	Yes
Body Battery	Yes	Yes
Step Counter	Yes	Yes
Calories Burned	Yes	Yes
VO2 Max	Yes	Yes
Wrist-Based Heart Rate	Yes	Yes
Water Resistance (5 ATM)	Yes	Yes
Bluetooth Connectivity	Yes	Yes
Smartphone Notifications	Yes	Yes
Music Playback (Music Version)	Yes	Yes
Garmin Pay	Yes	Yes
Women’s Health Tracking	Yes	Yes
Custom Workouts	Yes	Yes
Recovery Time	Yes	Yes
Training Effect	Yes	Yes
Interval Workouts	Yes	Yes
Price	Check Forerunner 255 Price	Check Forerunner 165 Price

FAQ

Is the Garmin Forerunner 165 suitable for serious runners?
Yes, the Garmin Forerunner 165 is designed for runners who want accurate tracking and modern features like an AMOLED display and HRV-based insights, though it lacks some advanced multisport features found in higher models like the Forerunner 255.

Does the Garmin Forerunner 255 have a touchscreen?
No, the Forerunner 255 relies on physical buttons for control, which many athletes prefer for reliability during workouts, especially in wet or sweaty conditions.

Can both watches track sleep and recovery?
Yes, both models provide detailed sleep stage tracking and recovery insights, showing users how well they’ve rested and when they’re ready for the next workout.

Do both Forerunner models have music support?
Yes, both have Music versions that allow users to download songs and playlists directly to the watch for phone-free listening during runs or workouts.

What is the main difference in GPS performance between the two?
The Forerunner 255 features multi-band GNSS, giving it superior accuracy in challenging environments, while the Forerunner 165 uses single-band GPS that is still accurate but less advanced.

Can both watches track heart rate continuously?
Yes, both provide 24/7 wrist-based heart rate monitoring, displaying real-time data during workouts and daily activities for better health tracking.

Are the Forerunner 255 and 165 waterproof?
Yes, both are rated 5 ATM water-resistant, meaning they can handle swimming, rain, and showers without damage.

Do they support Garmin Pay?
Yes, both models support Garmin Pay, allowing users to make contactless payments directly from their watch without needing a phone or wallet.

Which watch has better battery life?
The Forerunner 255 lasts longer, reaching up to around 14 days in smartwatch mode and 30 hours in GPS mode, while the Forerunner 165 typically lasts about 11 days in smartwatch mode and 19 hours in GPS tracking.

Can both watches show smartphone notifications?
Yes, both display call, text, and app notifications when connected to a compatible smartphone, keeping users informed without checking their phone.

Do both models support training plans?
Yes, both can sync Garmin Coach adaptive training plans, offering guided workouts for running goals such as 5K, 10K, or half marathon distances.

Can they measure blood oxygen levels?
Yes, both watches include a pulse oximeter sensor that measures blood oxygen saturation for insights into sleep quality and acclimation during high-altitude activities.

Are both compatible with external sensors?
Yes, both can connect to external sensors like heart rate straps, cadence sensors, and foot pods via Bluetooth or ANT+, though the Forerunner 255 supports a wider range of advanced sensors.

Do both watches track stress and Body Battery?
Yes, both provide stress tracking throughout the day and display Body Battery levels, helping users understand energy balance and recovery needs.

Which model is better overall?
The Forerunner 255 is better for advanced athletes and multisport users due to its dual-band GPS, extended metrics, and triathlon support, while the Forerunner 165 suits casual to mid-level runners seeking simplicity, a bright AMOLED display, and solid tracking at a lower price.