This post sums up what is new about the Garmin Edge 1040 vs 1030 Plus, so you can make up your own mind if the upgrade is useful for you.
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Garmin Edge 1040 vs 1030 Plus: Right Now I'd Buy THIS One
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Garmin Edge 1040 vs 1030 Plus: Right Now I'd Buy THIS One
Garmin Edge 1040 vs 1030 Plus: Right Now I'd Buy THIS One
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Garmin Edge 1040 vs 1030 Plus: Right Now I'd Buy THIS One
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Garmin Edge 1040 vs 1030 Plus: Right Now I'd Buy THIS One