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Garmin GPSMAP 66i vs Garmin Vivoactive 6

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

Garmin Vivoactive 6 is the lighter option — 195 g lighter than the Garmin GPSMAP 66i (85% less weight). If grams matter to you, that is the one to beat.
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Spec Garmin GPSMAP 66i Garmin Vivoactive 6
Weight 230 g · 0.230 kg · 0.51 lb 35 g · 0.035 kg · 0.08 lb
Brand Garmin Garmin
Category Navigation Navigation
Garmin GPSMAP 66i
230 g

Robust handheld GPS with inReach satellite communicator for two-way messaging. Preloaded topographic maps with 100-hour battery life.

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Garmin Vivoactive 6
35 g

Lightweight smartwatch at 1.2oz. Thinnest in Garmin lineup with GPS hiking features.

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Garmin GPSMAP 66i vs Garmin Vivoactive 6: which should you buy?

If saving weight is your priority, the Garmin Vivoactive 6 wins — at 35 g it is 195 g (85%) lighter than the Garmin GPSMAP 66i (230 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 navigation page, or browse the full gear weight database.

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