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Coros APEX 4 (42mm) vs Coros Apex 4 (42mm with silicone strap)

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

Coros APEX 4 (42mm) is the lighter option — 12 g lighter than the Coros Apex 4 (42mm with silicone strap) (21% less weight). If grams matter to you, that is the one to beat.
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Spec Coros APEX 4 (42mm) Coros Apex 4 (42mm with silicone strap)
Weight 44 g · 0.044 kg · 0.10 lb
42mm, with the nylon band
 56 g · 0.056 kg · 0.12 lb
Brand Coros Coros
Category Electronics Electronics
Coros APEX 4 (42mm)
44 g

Mountain sports GPS watch with dual-frequency satellite positioning for improved accuracy, ECG heart rhythm monitoring, and barometric altimeter for navigation

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Coros Apex 4 (42mm with silicone strap)
56 g

Rugged mountain sports GPS watch with AMOLED display, up to 85hr GPS battery. 56g in 42mm size, available with nylon strap option (lighter at 51g)

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Coros APEX 4 (42mm) vs Coros Apex 4 (42mm with silicone strap): which should you buy?

If saving weight is your priority, the Coros APEX 4 (42mm) wins — at 44 g it is 12 g (21%) lighter than the Coros Apex 4 (42mm with silicone strap) (56 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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