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Casio Pro Trek PRG-340 vs Polar Grit X

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

Polar Grit X is the lighter option — 2 g lighter than the Casio Pro Trek PRG-340 (3% less weight). If grams matter to you, that is the one to beat.
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Spec Casio Pro Trek PRG-340 Polar Grit X
Weight 66 g · 0.066 kg · 0.15 lb 64 g · 0.064 kg · 0.14 lb
Brand Casio Polar
Category Electronics Electronics
Casio Pro Trek PRG-340
66 g

Solar-powered outdoor watch with triple sensor.

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Polar Grit X
64 g

Multisport GPS smartwatch weighing 64g with wristband. Rugged design with navigation, long battery life, and military-grade durability.

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Casio Pro Trek PRG-340 vs Polar Grit X: which should you buy?

If saving weight is your priority, the Polar Grit X wins — at 64 g it is 2 g (3%) 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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