Garmin Tactix 8 51mm Solar

Name: Garmin Tactix 8 51mm Solar
Brand: Garmin

Garmin Tactix 8 51mm Solar is a GPS sports watch released in February 2025. Key specs: case size 51 mm, screen size 1.4″, battery life (smartwatch mode) 30 days, GPS battery life 95 h.

7.7Score

Display4.4

Battery life9.2

Health tracking8.3

Sports & outdoor9.3

Smart features3.2

Build & durability6.2

price range$1,250–1,550

Full specifications

Released: February 2025
Type: GPS sports watch
Brand: Garmin
Popularity: #243 of 796
Model numbers: tactix 8 – 51 mm, Solar, Elitetactix 8 – 47 mm, AMOLEDtactix 8 – 51 mm, AMOLED

51 mmCase size

1.4″Screen size

NoAMOLED / OLED display

30 daysBattery life (smartwatch mode)

95 hGPS battery life

10 ATMWater resistance

95 gWeight

YesNFC payments

Spec guide

How it ranks among GPS sports watches of 2025

Spec guide

Screen size · 1.4″Bottom 34%Battery life (smartwatch mode) · 30 daysTop 3%GPS battery life · 95 hTop 3%Water resistance · 10 ATMTop 17%Weight · 95 gBottom 2%

Compared with GPS sports watches released in 2025. Bars show the share of models it beats.

compared with other GPS sports watches

Why is Tactix 8 51mm Solar a good choice?

Battery life (smartwatch mode): 30 daysbetter than 93% of GPS sports watches

GPS battery life: 95 hbetter than 97% of GPS sports watches

Sport profiles: 102better than 92% of GPS sports watches

Weak points

Weight: 95 gworse than 89% of GPS sports watches

In rankings

#12Longest battery life #3Longest GPS battery life #19Best watches for running and the outdoors #29Longest battery in power-saving mode #27Most sport modes #24Deepest dive ratings

Specifications

Full specifications

Design & durability

Case size: 51 mm
Weight: 95 g
Thickness: 15.4 mm
Height: 51 mm
Width: 51 mm
Case material: Titanium
Sapphire crystal: Yes
Lens / cover glass: Power Sapphire ™
Strap material: silicone
Water resistance: 10 ATM
Water rating (maker): 10 ATM
Rated dive depth: 40 m

Display

Screen size: 1.4″
Display technology: Memory-in-pixel (transflective)
Panel: Sunlight-visible, transflective memory-in-pixel
AMOLED / OLED display: No
Always-on display: Yes
Touchscreen: Yes
Resolution (width): 280 px
Resolution (height): 280 px
Pixel density: 200 ppi

Battery

Battery life (smartwatch mode): 30 days
Battery saver mode: 48 days
GPS battery life: 95 h
Battery type: Lithium ion
Solar charging: Yes
Wireless charging: No
Charging: Garmin proprietary plug charger

Health sensors

Optical heart rate: Yes
Blood oxygen (SpO2): Yes
ECG: Yes
Skin temperature: Yes
Temperature sensor: Yes
HRV tracking: Yes
Sleep tracking: Yes
Sensors: GPS, GLONASS, Galileo, QZSS, BeiDou, SatIQ technology, Elevate wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Gyroscope, Accelerometer, Thermometer, Ambient light sensor, Depth sensor