For bike GPS, pick Edge 840 for a smaller, lighter unit; choose Edge 1040 for a bigger screen and much longer runtime.
Edge 840
Edge 1040
Small & Capable
- 2.6″ touch plus full buttons.
- 32 GB maps and fast address search.
- Lower price; easy fit on short stems.
Garmin Edge 840
Big Screen & Long Days
- 3.5″ display with larger map fields.
- 35–70 h battery; metal mount tabs.
- Great for randonneurs and heavy nav.
Garmin Edge 1040
Endurance Upgrade
- Solar extends saver mode up to 100 h.
- 64 GB storage; multi‑region maps.
- Ideal for bikepacking & travel.
Garmin Edge 1040 Solar
Bike computers shape how you pace, navigate, and read the road. Garmin’s mid‑size 840 and full‑size 1040 take different routes to the same goal. One favors a compact footprint; the other doubles down on battery and mapping comfort. This guide gives you the fast verdict and the trade‑offs that steer buyers one way or the other.
In A Nutshell
The Edge 840 fits riders who want a smaller unit with touchscreen control and full physical buttons. It’s light, easy to mount on short stems, and costs less. The Edge 1040 suits anyone who stares at maps, rides long, or tours for days. Its 3.5‑inch screen is easier to read, and its battery lasts far longer, especially in the Solar edition.
If you care more about price and size, go 840. If you want maximum runtime, a larger canvas for maps, and sturdier metal mount tabs, go 1040. Both share multi‑band GNSS, ClimbPro for free‑ride climbs, training tools, and deep sensor support.
Side‑By‑Side Specs
Edge 840 — What We Like / What We Don’t Like
✅ What We Like
- Compact body that sits neatly on short stems and crowded handlebars.
- Touchscreen and a full set of buttons for wet rides and gloves.
- Multi‑band GNSS locks in quicker and holds signal in tree cover.
- 32 GB storage is enough for multiple regions and POI data.
- ClimbPro shows upcoming climbs in free‑ride mode, no route needed.
- Lower MSRP with the same training tools found on larger units.
⚠️ What We Don’t Like
- Smaller screen makes map fields and turn banners tighter at speed.
- Battery isn’t built for multi‑day rides unless you manage saver settings.
- Composite mount tabs aren’t as burly as the 1040’s metal back.
Edge 1040 — What We Like / What We Don’t Like
✅ What We Like
- Huge battery headroom; Solar model stretches saver mode to very long runtimes.
- 3.5″ screen with larger map fonts and more room for data.
- Metal mount tabs add durability for rough gravel and MTB.
- Solar version doubles storage to 64 GB for multi‑region maps.
- Same training features, free‑ride ClimbPro, and multi‑band GNSS.
⚠️ What We Don’t Like
- Bigger footprint can clash with bar bags or short aero tops.
- Higher MSRP; Solar premium adds more.
- Extra weight compared with mid‑size units.
Edge 840 Or 1040: Which Fits Your Rides
Display & Build
The 1040’s 3.5″ panel makes route lines, cross‑streets, and turn banners easier to read at 25+ mph or on chattery dirt. It’s a clear win for navigation comfort. The 840’s 2.6″ screen still looks sharp, but the smaller canvas nudges you to zoom more often. If you keep lots of data fields in view, the larger unit breathes better.
Size affects cockpit harmony too. The 840 tucks in on short stems and narrow bars without crowding bags or lights. The 1040 asks for more real estate, yet its metal mount tabs add confidence over rough ground. Both use a standard quarter‑turn mount and ship with an out‑front option plus a basic stem mount in most box sets.
Battery & Charging
Runtime is the big divider. The 840 claims up to 42 hours and, in Solar trim with saver settings, up to 60 hours in ideal sun. The 1040 pushes farther: up to 35 hours for the base unit, while the Solar edition advertises up to 45 hours in demanding use and up to 100 hours in saver mode under strong daylight. These figures depend on GPS mode, backlight, sensors, and terrain, but the gap is real.
Both units charge over USB‑C and can sip power mid‑ride if needed. Saver modes let you trim backlight, map refresh, and GNSS settings to stretch long days. If you ride ultras or multi‑day events, the 1040 Solar is the set‑and‑forget pick. If your rides fit inside a weekend’s worth of charge, the 840 is plenty.
Performance & Speed
Route calculation, screen redraws, and menu taps feel brisk on both devices. The 1040’s extra screen space reduces tap depth by showing more fields at once. The 840’s combo of touch and physical buttons is great in rain, mud, or winter gloves. Both cache map tiles on‑device, so panning and zooming stay smooth once your regions are loaded.
Cameras & Sensors
Each unit pairs with ANT+ and Bluetooth sensors, smart trainers, radar lights, and electronic shifting. Multi‑band GNSS is standard, sharpening tracks through canyons and heavy tree cover. ClimbPro now works in free‑ride mode on these devices, so upcoming climbs with grade and distance appear even when you’re not following a course. Garmin’s help page explains how ClimbPro surfaces and what it shows during a ride. See ClimbPro overview.
Software & Updates
Both units receive feature updates and map improvements through Garmin’s standard channels. A recent software track added Wi‑Fi map downloads to the 840 and 1040, which means you can swap or refresh regions without a computer in many cases. That’s handy before a trip when you remember a missing map the night before.
Ports & Connectivity
USB‑C across the board simplifies cables with phones and modern power banks. You get ANT+, Bluetooth, and Wi‑Fi for sync, sensor pairing, and automatic uploads. The 1040’s metal mount tabs offer a tougher interface with your out‑front mount if you race gravel or ride washboard; the 840’s lighter body keeps total cockpit weight down.
Pricing & Packages
MSRP lands lower for the 840, with a Solar option that adds panel‑assisted range. The 1040 costs more, and the Solar model carries a higher premium still. Bundles that add HR strap, speed, and cadence sensors are widely available from U.S. retailers. If you’re stretching dollars, start with the device‑only package; you can add sensors later as needed.
ℹ️ Good To Know: Garmin lists the 1040 Solar at up to 45 hours in demanding use and up to 100 hours in saver mode under strong sun; the 840 Solar quotes up to 60 hours in saver mode. Real‑world time varies with GPS mode, backlight, and sensors. See Garmin’s Edge 1040 Solar battery expectations and the official 1040 owner’s guide PDF for specs and settings here.
Price, Value & Ownership
The price gap is clear, and the battery gap is larger. If you travel across map regions or need more storage, the 1040 Solar’s 64 GB makes life easier when loading global maps. If you ride locally and cost matters, the 840 gives you the same training tools without the bigger bill.
Where Each One Wins
🏆 Screen Readability — Edge 1040
🏆 Compact Cockpit — Edge 840
🏆 Price — Edge 840
🏆 Mount Durability — Edge 1040
Decision Guide
✅ Choose Edge 840 If…
- You want a lighter head unit that won’t crowd a small cockpit.
- You like touchscreen convenience but also want full physical buttons.
- Your longest rides fit inside two weekend days without charging.
✅ Choose Edge 1040 If…
- You ride long brevets, multi‑day tours, or all‑day gravel.
- You want a larger map window with bigger turn prompts.
- You prefer a tougher mount interface and more storage for maps.
Best Fit For Most Riders
Most buyers should start with the Edge 840. It delivers the same training features, free‑ride ClimbPro, and multi‑band positioning in a smaller, cheaper package. It’s easy to live with on everyday rides, simple to mount on tight cockpits, and strong enough for long Saturdays.
Pick the Edge 1040 if your rides stretch past dinner, your eyes want a larger map window, or you’re planning bikepacking trips where charging is scarce. The Solar model, in particular, is built for riders who measure days, not hours.
This guide compiles official specs and manuals with widely cited expert coverage. For device pages and battery details, see Garmin’s product listings for Edge 840 and Edge 1040, plus Garmin’s Edge 1040 Solar battery guidance.