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Casio Pro Trek PRG-340 vs Garmin Fenix 8 AMOLED 43mm

Weight and specs compared for 2026 — and which one to choose.

Garmin Fenix 8 AMOLED 43mm is the lighter option — 6 g lighter than the Casio Pro Trek PRG-340 (9% less weight). If grams matter to you, that is the one to beat.
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Spec Casio Pro Trek PRG-340 Garmin Fenix 8 AMOLED 43mm
Weight 66 g · 0.066 kg · 0.15 lb 60 g · 0.060 kg · 0.13 lb
Brand Casio Garmin
Category Electronics Electronics
Casio Pro Trek PRG-340
66 g

Solar-powered outdoor watch with triple sensor.

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Garmin Fenix 8 AMOLED 43mm
60 g

Premium multisport GPS smartwatch with AMOLED display, titanium case, multi-GNSS support, and built-in LED flashlight. 43mm size, lightweight at only 60g with t...

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Casio Pro Trek PRG-340 vs Garmin Fenix 8 AMOLED 43mm: which should you buy?

If saving weight is your priority, the Garmin Fenix 8 AMOLED 43mm wins — at 60 g it is 6 g (9%) lighter than the Casio Pro Trek PRG-340 (66 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest electronics page, or browse the full gear weight database.

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