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Garmin Edge 840 — Specs & Analysis
Manufacturer specifications, compared against every other navigation & electronics in our database. We do not test gear in the field — we measure, verify, and compare.
Garmin's Edge 840 combines cycling computer metrics with serious navigation. The button interface works perfectly with gloves, and the mapping is the most detailed available. ClimbPro tells you exactly what's coming on every ascent.
Who Is the Garmin Edge 840 Best For?
Data-driven riders who want the most detailed maps and metrics. If that describes your riding style, the Edge 840 should be at the top of your shortlist. It sits in the Navigation & Electronics category alongside 10 other products we track.
How It Compares
At 84g and $400, the Edge 840 is 29g heavier than the lightest option in this category (the Sigma ROX 11.1 EVO at 55g). The most budget-friendly option is the Garmin eTrex SE at $150.
The price-to-weight ratio comes in at $476 per 100g — a premium price point, but you're paying for quality, materials, and design that justify the investment for serious bikepackers.
What We Like
- +Among the best on paper mapping detail
- +Physical buttons work with gloves
- +ClimbPro for climb breakdowns
- +Massive third-party app ecosystem
Watch Out For
- −Interface has a learning curve
- −Most expensive option at $400
- −Smaller screen than ROAM V2
The Bottom Line
We haven't scored the Garmin Edge 840, and neither has anyone else we can cite. It's here for its verified specifications and dimensions, which is what the fit tools run on — a score is an editorial judgement, and we don't hand one out until someone has a basis for it. What this page can tell you is measured: 84g, $400, and how both sit against every other navigation & electronics product we track.
The price and weight above have not yet been checked against the manufacturer's own page. We are working through the catalogue and saying so as we go, rather than letting silence imply otherwise.
Specifications and dimensions come from the sources listed above. Where a page draws on first-hand riding, it says so.
What it packs down to
Garmin publishes a packed size of 2.2" x 3.3" x 0.8", which is 0.1 litres as a folded block. Of the 55 bags we track that publish a capacity, 55 have room for it and 0 do not.
Volume is computed from Garmin's own packed size, treating a two-dimension figure as a stuff sack. Bag capacities are the makers' published figures, not ours — 12 of the bags we hold dimensions for publish no capacity and are left out of the count rather than assumed. A stuff sack does not reshape itself, so read the headroom as room to spare rather than a guarantee it goes in easily.
How it compares
Against the 11 navigation & electronics we hold published specs for.
At 84g the Edge 840 is lighter than 6 of 10 alternatives we track. The category median is 93g.
At $400 it undercuts 2 of 10 of them, against a median of $350. That works out at $476 per 100g — above the $368 median for navigation & electronics.
Weight and price come from published specifications. Cost per 100g is a blunt measure — it rewards light gear and says nothing about durability or whether the thing works — so treat it as one input, not a verdict.
More in Navigation & Electronics
GPS units, bike computers, and phone mounts for route finding.