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Edge 840 Computer

4.487179487179487 out of 5 stars
78 Reviews



Why We Like The Garmin Edge 840 Computer

Our search for an advanced GPS cycling computer that meets our needs ends with the Garmin Edge 840 Computer. Its touch screen and streamlined user interface make it easy to swipe and tap to our desired screen to access important information. Pairing our device with a compatible heart rate monitor or power meter lets us see live power targets and stamina insights as we ride and receive personalized adaptive coaching and workouts based on our current training load. The superior battery life keeps us riding as long as we desire, while the included multi-band GNSS technology provides superior location accuracy even in a dense forest or high up in a canyon.


  • A touch screen cycling computer with advanced GPS navigation
  • Provides personalized coaching and workouts with a HRM or power meter
  • GNSS multi-band technology delivers pinpoint accuracy in any location
  • Responsive touch screen and button controls for friendly use
  • ClimbPro planner keeps us climbing by showing remaining ascent/grade %
  • Ride-specific maps show popular trails, roads, and points of interest
  • Use for up to 26hrs in demanding use and 42hrs in battery saver mode
  • Includes an out-front and standard mount for two mounting options
  • Item #GRMF06I
Housing Material
Battery Type
Lithium ion cell contained in equipment
Battery Life
[demanding use] up to 26 hours, [battery saver mode] up to 42 hours
Low Battery Indicator
Mount Type
out-front mount, standard mount
Edge 840, out-front mount, standard mount, tether, USB-C cable, documentation
2.3 x 3.4 x 0.8in
Face Size
2.6in diagonal
Claimed Weight
cross-country, enduro, gravel, road cycling, trail
Manufacturer Warranty

Overall Rating

4.5 based on 79 ratings

Review Summary

1 Stars - 2 reviews
2 Stars - 2 reviews
3 Stars - 7 reviews
4 Stars - 12 reviews
5 Stars - 56 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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5 out of 5 stars

December 7, 2023

Outstanding piece of gear!

I was concerned about connecting all my sensors on my bike and body and this thing picked them up automatically, which made this an extremely easy addition to my racing kit. Also the display of the information is vibrant and easily readable when on the edge of performance. This is the pinnacle of bike computers.


Originally reviewed on Garmin

3 out of 5 stars

December 5, 2023

Not user friendly

I’ve used my new Edge 840 for enough rides to get a feel for it and I’m still unable to. The map hasn’t worked well and the climb notification is nearly impossible to find, even when I’m in the midst of a climb. My buddy has a Karoo that seems much easier to manage.


Originally reviewed on Garmin

5 out of 5 stars

November 26, 2023

Great overall features

I have used my Garmin 840 a number of times on rides. The features and connectivity to my watch, radar and other seniors are great. Added features to warn me of traffic, turns and climbs is fantastic. Great addition to my riding.


Originally reviewed on Garmin

5 out of 5 stars

November 26, 2023

Easy to setup

Bought an Edge 840and have used it 10 times in the last couple of weeks. Found it very easy to set up and use. Would recommend it.

Cycle 100,000

Originally reviewed on Garmin

5 out of 5 stars

November 25, 2023

Great computer

I purchased this about a month ago and my favorite feature is that it is simple to use. It automatically integrates with the garmin radar and keeps track of battery life of everything. I have not used all of the options due to my own issues but expect to within the next month.


Originally reviewed on Garmin

4 out of 5 stars

November 23, 2023

Climbpro was disappointing

I bought this 2 months ago as an upgrade to my Garmin Edge 510. I really like the combination of buttons and touch screens. I was excited to get to my first climb to try out the Climbpro but was quickly disappointed as I can not read the numbers on the screen: Avg gradient, length of the climb and total feet of climbing. Those 3 critical data points are the smallest on the screen. My suggestion would be to get rid of the map and use that extra real estate to enlarge the numbers and provide choices as to what goes where. I am really hoping Garmin gives this flexibility with an upgrade soon.


Originally reviewed on Garmin

5 out of 5 stars

November 22, 2023

Great cycling computer

I've had the Garmin Edge 840 computer for a little over a month and love it. the screens are easy to set up and with the touch screen easy to scroll if needed.


Originally reviewed on Garmin

3 out of 5 stars

November 16, 2023

Needs better interoperability with Apple ecosystem

There are a number of features that are unavailable without an accompanying Garmin watch. I have health data from my Apple watch (e.g. VO2 Max and resting heart rate), but I cannot manually enter it in the Garmin ecosystem -- frustrating. Also, every time I eject my Edge 840 from my MacBook Air, I have to force a hard reset to regain operation. It hangs during restart.


Originally reviewed on Garmin

5 out of 5 stars

November 13, 2023


I purchased this about Oct 21, 2023 I was going to get the 540 but my wife talked me in to getting the 840 an I'm glad she did had had but about 5 rides with it so I'm still learning how to use it but so for its great


Originally reviewed on Garmin

5 out of 5 stars

November 11, 2023

Why did I wait so long!!

Love this thing exclamation battery lasts for weeks exclamation amazing features highly recommend having one


Originally reviewed on Garmin