Wear Radar

Garmin Forerunner 265vsPolar Grit X

40d vs 13d
battery life
Polar Grit X lasts longer
$550
price gap
Garmin Forerunner 265 cheaper
10g
lighter
Garmin Forerunner 265
2
more health sensors
Garmin Forerunner 265
Garmin Forerunner 265
Buy/Wait:superseded

This model is no longer sold new. It has been replaced by the Garmin Forerunner 570.

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Polar Grit X
Buy/Wait:bad

Overdue for a refresh — no successor announced yet. Prices should be at their lowest

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Garmin Forerunner 265Polar Grit X
Pricing
Starting price$449★$999
Subscriptionℹ️ Optional — $70/yr✓ None
Hardware
Weight47g★57g
Water resistance5ATM100m★
Battery13 days40 days★
Always-on display❌❌
GPS✅✅
Cellular❌❌
PlatformiOS & AndroidiOS & Android
TierSports GPSSports GPS
Buy timing
ReleasedMar 1, 2023Apr 11, 2024
Cycle advicesupersededbad
Deals adviceclearancegreat
Next model——

Health Sensors

Garmin Forerunner 265 only
3 exclusive sensors
Stress TrackingStress estimate from HRV and physiological signals
Body BatteryGarmin's energy reserve — how much fuel left in the tank
Training ReadinessDaily recovery score — how ready you are to perform
Both
3 shared
Heart RateContinuous or on-demand pulse tracking
SpO2Blood oxygen saturation, tracked during sleep
HRVHeart rate variability — stress & recovery scores
Polar Grit X only
1 exclusive sensor
Running PowerWrist-based watt output — tracks effort independent of terrain

Why buy each?

Garmin Forerunner 265

Multi-band GPS accuracy

L1+L5 multi-band GPS reduces position drift in urban canyons and dense forest.

Training readiness score

Daily score combining HRV status, sleep, acute load, and recovery time.

Race time predictor

Estimates finish time for 5K, 10K, half-marathon, and marathon based on current fitness.

Polar Grit X

40-day battery for trail and ultra runners

Five times the battery of the Vantage V3 — enough for week-long mountain stages or ultramarathons without charging access.

Hill splitter auto-detection

Automatically segments your run by uphill and downhill sections, calculating pace and power for each — essential for mountain race training.

Wrist-based running power

Running power without a chest strap or foot pod, built into the watch.

Quick Winner

The right pick depends on what you optimize for.

For the budget
Garmin Forerunner 265 wins

$659 vs $999 over 3 years.

For battery life
Polar Grit X wins

40 days vs 13 days battery.

For health depth
Garmin Forerunner 265 wins

6 sensors.

For daily comfort
Garmin Forerunner 265 wins

47g.

Bottom Line

Technical gaps
  1. Forerunner 265-only sensors: Stress Tracking, Body Battery, Training Readiness.
  2. Grit X-only sensors: Running Power.
  3. Weight. Forerunner 265 is 10g lighter — relevant for all-day comfort and sleep.
  4. Water resistance. Grit X rates 100m vs 5ATM on Forerunner 265.
Commercial gaps
  1. Hardware cost. Forerunner 265 is $550 cheaper upfront ($449 vs $999).
Pick the Garmin Forerunner 265 if…

Regular runners who race 5K to marathon distances and want accurate GPS and detailed training load management.

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Pick the Polar Grit X if…

Trail runners, hikers, and outdoor athletes who want Polar's analytics with significantly longer battery life than the Vantage V3. The titanium case and sapphire glass make it suitable for technical terrain where watch durability matters.

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