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Item # GRM004T

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Item # GRM004T

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Regardless of the passion with which they argue against one another, one thing data geeks and anti-tech purists can't dispute is that with the right technology, numbers never lie. In the case of the Garmin Edge 520 Bike Bundle Computer, it's undeniably true. Drawing from Garmin's years of expertise in GPS and satellite technology, the Edge 520 houses dozens of honest numbers, neatly divided into categories to help you get a well-rounded view of your training. Invest in the 520 bundle and you'll have everything you need to get your 520 up and running and access most of the computer's potential data.

One of the major ways Garmin separated the 520 from its lesser admirers was by equipping the computer with the ability to deliver live Strava updates as you ride. As you're slowed by the doldrums of the middle of a climb, no end in sight, look down at the screen to see how you're faring against your local rivals. Make note of exactly where you're starting to fall behind and change tactics if you can, then look down again at the top to see exactly where you finish as soon as you surge past the end of the segment.

Aside from Strava addicts, the Edge 520 also caters to power meter worshippers, displaying functional threshold power (FTP) on-screen when paired with Garmin's Vector power meter pedals. While you ride, compare it to your ever-changing output and make mid-ride adjustments to keep your training effective. Take numbers like estimated V02 max, calculated using heart rate, into consideration when mapping out your training schedule and workouts, being careful to note recommended recovery time that the Edge calculates based on the effort level of each of your workouts. Recovery may seem like a no-brainer, but amateur athletes are often some of the worst offenders at overtraining. These new features are the big news, but don't worry — the Edge 520 still comes with all of the standard bike computer functions you've come to rely on in the saddle too, with a few signature Garmin extras.

  • Bundle includes: heart rate monitor, cadence sensor, speed sensor, standard and out-front mounts, USB cable, tether, and manuals
  • Displays live Strava updates as you ride
  • Compatible with Shimano D-Fly Data Management system
  • ANT+ compatible
  • Displays functional threshold power when paired with Garmin Vector pedals
  • Calculates estimated V02 max and recommended recovery time
  • Shows weather
  • Can be synced with smartphone
  • Customizable workouts and screens
  • Also measures: speed, distance, trip time, altitude, heart rate
  • Up to 15 hour battery life

Tech Specs

Heart Rate Monitor:
yes, ANT+
yes, 12/24 hour
Battery Type:
lithium ion
Mount Type:
stem (included)
Recommended Use:
Manufacturer Warranty:
1 year

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Avg. ride time: 3h 58m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Is it the Garmin heart rate and cadence/speed sensors which are included? Or is it a generic?

Fredrik, These come with the Garmin sensors.

Hi Fredrik, the bundle unit includes a heart rate strap, as well as a speed sensor and a cadence sensor. The Bundle also includes an out front Garmin mount in addition to the standard mounts.

Avg. ride time: 1h 43m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Two Different Review Locations?

    This seems dumb there are two different reviews (locations) for this product depending if a bundle or just the 520 unit alone. These reviews really need to be combined.

    Avg. ride time: 3h 30m per week
    • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.


    • Familiarity: I've put it through the wringer

    I have had the Garmin Edge 205, 500, 510, and now the 520. Not gonna lie, I kind of miss the touch screen of the 510 even though it was not the most sensitive of screens. It did make navigating a little easier. And the 500 had adjustable volume, which I have also missed. But the 520 has a much sharper screen and only requires a few minutes to set up before hitting the road and trails.

    I upgraded from the 510 to the 520 purely for the phone notifications. I like being able to know if the text I just heard come in is important or not, without having to pull out my phone.

    The Live STRAVA segments is a pretty neat feature, although when riding trails I will get "off course" notifications due to the meandering nature of trail riding. On roads this has not been an issue though.

    Garmin is at the top of the computer game, quality built, accurate and easy to use. I have tried other bike computers and always come back to Garmin.
    Simply the best.

    If you have any questions for me, I can be reached at FDalmer@Backcountry.com


    Correction for Live Segments, I have realized that STRAVA Live Segments alerts you to any segments that you have "starred" on STRAVA. When I deselected the segments, I was no longer alerted to them, so my minor quibble was a result of my own ignorance of the feature.

    Love it

      After a couple weeks with this it really has helped my motivation to push it during intervals. Set it up for your favorite hills and the virtual partner really pushes you. On the uphill it's great on the mountain bike but I rarely look at it going downhill. On the road bike it's easy enough to see on ascent or descent.

      Are you able to print out your workouts? My husband needs one that will be able to proven to get work credit for it. And if so does this one work on indoor trainers?

      if you use garmin connect you can share your rides like this: https://connect.garmin.com/modern/activity/975130097

      Hi Gail,

      Workouts can be uploaded to sites like STRAVA or Garmins own Garmin Connect site. From there you can definitely print a screen shot of a ride / workout. As for indoor trainer use, if you have a speed / cadence sensor like the one that comes in the bundle, you can use this while riding on an indoor trainer and it will track your ride.

      High expectation, adequate performance!

      • Familiarity: I've put it through the wringer

      Just bought this bundle. I've had it for about two weeks now. I was really excited about this computer, as I am a gear junkie; however, the excitement has died in the recent weeks. Why? the computer performs as described, but the directions (very few in my box) are barely sufficient. There seems to be several ways of accessing and performing functions. You can do it in one screen and realize that another screen will get you to the same place. The edge 520 is not intuitive and simple to navigate. Meaning, you have to play with it and familiarize yourself with the variety of functions and tailor it to your needs (courses, segments, displays). The map is barely functional, but (youtube's search of openstreetmaps and edge 520) it can be worked around. I gave it 3 star's because it is exactly that... "Adequate for the Job." If you buy this computer understand that it is a functional bike computer. Don't expect a $400.00 bike computer that will dazzle you, it will not happen. Lower your expectations and buy it for its ANT functions, GPS/GLONASS, and training functions. In all, I wish I was dazzled for $399.00. Lower your expectations and you should not be disappointed.

      NOTE: The screen can be difficult to see in certain daylight conditions. Mine came with out front mount and 2 additional mounts. A full descriptive manual was not included in mine.

      Avg. ride time: 2m per week
      • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

      What's the speed/cadence sensor that this bundles with?

      It comes with the new wireless speed and cadence sensor. Easy install.

      how does the 'grade' function work? what are the data points it uses to calculate the 'grade'?

      I'm not 100% sure but I think it gets explained on DCRainmaker. Great review that's techy and objective.

      Best Answer

      I believe it uses distance and elevation to calculate gradation. In my opinion it works well, but do not expect to get instant results. Meaning, it will take a second or two of riding to calculate the degree. On rolling hills I will notice that the gradient displayed will be already behind by 15 feet. This is not a issue for me and I consider it a reasonable deficiency and would be pressed to find a better computer that can display more accurate results.