Garmin Forerunner 255 review: is it worth it?

Reviewing the Garmin Forerunner 255: Worth the Investment?


For whom?
Regular sportsmen (running, trail, triathlon). Not for pros (lack of cartography) or geeks (non -tactile screen). Ideal for those looking for a complete training tool without frills.

See the Forerunner 255 and the opinions on Amazon

Design & Comfort

  • Solid but sober : resistant case, flexible bracelet.

  • Two sizes (41mm/46mm) to adapt to all morphologies.

  • Rigid buttons (harder than the previous model), noticeable mechanical noise.

Features

  • Specific sensors : Double frequency GPS (top in forest/mountain), reliable v4 elevate v4, barometric altimeter.

  • Serious features : native racing power, triathlon mode, detailed monitoring of recovery (Body Battery), morning report.

  • Gaps : No Training Readiness score (reserved for high -end models), MIP screen less readable than the AMOLED.

Autonomy

  • 30 hours in classic GPS4 p.m. in multi-gNSS + double frequency.

  • 14 days in watch mode (12 days in real with notifications).

  • Fast recharge possible during activity.
    → Honorable outfit, but divided by 2 with precise GPS mode.

Strengths/Weak points

  • What kills ::
    ➔ Pro-level GPS precision
    ➔ Double housing size
    ➔ Unbeatable quality-function report in its category

  • What disappoints ::
    ➔ buttons less reactive than fenix
    ➔ Inward price vs Forerunner 245
    ➔ Less bright screen than the Amoled (ex: Forerunner 265).

Verdict
Top For demanding athletes who prioritize reliability and training metrics. Flop If you want a premium design or a touch screen.

Scott Gilbertson, a specialized journalist at Wired, underlines in his detailed test that the Forerunner 255 offers GPS “Pro-Level” precision, ideal for runners looking for reliable monitoring without superfluous.

Alternative ::

  • Coros Pace 3 : Best autonomy/price ratio, ideal for minimalists.

  • Garmin Forerunner 265 : AMOLED screen + Training Readiness, but + dear.

For the price (≈350 €) : Best versatile GPS watch in 2025. A sustainable investment, not a gadget.

Comparison: Garmin Forerunner 255 vs 4 other watches

Characteristic Garmin Forerunner 255 Polar Vantage V2 Coros Pace 2 SUUNTO 9 PEAK Apple Watch Series 8
1. Dimensions (mm) 46 x 46 x 12.9 47 x 47 x 13 42 x 42 x 11.7 43 x 43 x 10.6 41/45 mm (varied in thickness)
2. Weight (G) 49 52 29 52 38 to 39
3. Screen size (inch) 1,2 1,2 1,2 1,2 1.69 / 1.9 (depending on model)
4. Screen resolution 240 x 240 240 x 240 240 x 240 240 x 240 352 x 430/396 x 484
5. Screen type Transflective Mip Color Mip Transflective Mip Color matrix Oled
6. GPS Yes Yes Yes Yes Yes
7. Yes Yes Yes Yes No
8. Galileo Yes Yes Yes Yes No
9. Autonomy in GPS mode (H) Up to 30 Up to 40 Up to 30 Up to 25 Up to 7
10. Autonomy in watch mode (days) Up to 14 Up to 7 Up to 20 Up to 14 1 to 2 (depending on use)
11. Optical cardio sensor Yes (Elevate) Yes (precision prime) Yes Yes Yes
12. ECG sensor No No No No Yes
13. Barometric altimeter Yes Yes Yes Yes Yes
14. Yes Yes Yes Yes Yes
15. Yes Yes Yes Yes Yes
16. Gyroscope Yes Yes No Yes Yes
17. SPO2 sensor Yes (Pulse Ox) Yes No Yes Yes
18. 5 ATM 10 ATM 5 ATM 10 ATM 50 m (IPX7 approx.)
19. Contactless payment Yes (Garmin Pay) No No No Yes (Apple Pay)
20. Music storage Yes (approx. 500 songs) Yes (approx. 100-200) No No Yes (depending on capacity)
21. Direct music reading Yes Yes No No Yes
22. Bluetooth Yes Yes Yes Yes Yes
23. Wi-fi Yes Yes No Yes (depending on version) Yes
24. Ant+ Yes No Yes No No
25. Running Dynamics function Yes (with pod or belt) Yes (via sensor) Yes (Coros Pod) Yes (necessary belt) No (third apps only)
26. Sleep monitoring Yes (advanced) Yes Yes Yes Yes
27. Stress metric Yes Yes No Yes (basic) Yes
28. Virtual coach Yes (Garmin Coach) Polar Flow Coaching No No Apple Fitness+ (optional)
29. Followed by the menstrual cycle Yes Yes No No Yes (via health app)
30. Smartphone notifications Yes (iOS & Android) Yes (iOS & Android) Yes (iOS & Android) Yes (iOS & Android) Yes (iPhone)
31. Garmin Connect compatibility Yes Yes (possible export) Synchro via Coros App Partial (via MovesCount) No (third apps only)
32. Strava integration Yes (Auto Sync) Yes (Auto Sync) Yes (Auto Sync) Yes (Auto Sync) Yes (via App Strava)
33. Screen customization Yes (dials and data fields) Yes (sports profiles) Yes (via coros app) Yes (limited) Yes (Apple Watch Faces)
34. Interchangeable bracelet Yes (22 mm) Yes (22 mm) Yes (20 mm) Yes (22 mm) Yes (owner system)
35. Triathlon mode Yes Yes Yes Yes No (required third app)
36. Integrated mapping No (Forerunner 255 has no cards) No No Yes (Suunto 9 Peak via app) Yes (Apple Maps, but limited)
37. Touch screen No (buttons only) No No No (buttons, very limited touch) Yes
38. Control via buttons Yes (5 buttons) Yes (5 buttons) Yes (2 buttons + dial) Yes (5 buttons) Driven & tactile (side button)
39. Approximate price (EUR) Approx. 350 € Approx. 500 € Approx. 200 € Approx. 500 € Approx. 450-500 €
40. Exit on the market (year) 2022 2020 2020 2021 2022

Quick quiz: Is the Garmin Forerunner 255 made for you?

1. You mainly practice:

2. You are looking for:

3.Vo your budget is:

4.You want:

5. Specific works:

Result:

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