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Karoo 2 GPS Bike Computer

4 out of 5 stars
11 Reviews

Out of Stock

Don't worry though, we have a lot more Cycling Computers in stock than that.

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Why We Like The Karoo 2 GPS Bike Computer

If we're rolling with a bike computer, we like it to be a reliable source of navigation that features lightning-fast software, and that's why we like the Karoo 2 GPS Bike Computer. It features next-generation software that provides only the best mapping and navigation for our ride with data that lets us reach our goals and push peaks. The Karoo 2 is simple to use and looks great with exceptional attention to detail and enhancements that lead the pack in performance cycling equipment. It's designed to put our ride first and make it easy to follow routes, connect to Strava and other apps, and complete our workouts.


  • A reliable bike computer that puts the rider first
  • High-resolution display panel with a responsive touchscreen
  • Water and dustproof to IP67 rating for battling the elements
  • 12 hours of ride time and fully charged in under three hours
  • ANT+, Bluetooth, and WiFi connectivity with high accuracy GPS
  • Hammerhead mounting system is reliable and easy to use
  • Accessible and simple route building for convenient use
  • Turn-by-turn navigation keeps us on track
  • Item #HMR0002
Operating System
Android 8(Oreo)
Battery Type
2500 mAh high capacity battery
Battery Life
Low Battery Indicator
Mount Type
Hammerhead Karoo 2 Mounting System, Quarter-Turn Mounting Adapter, 2.5mm allen key, USB-A to USB-C cable, lanyard
19.3mm x 60.8mm x 100.6mm
Face Size
[screen] 2.72 x 1.61in (69 x 41mm)
Claimed Weight
[Karoo 2 and Hammerhead Mount] 167g
Manufacturer Warranty
1 year

Overall Rating

4 based on 11 ratings

Review Summary

1 Stars - 1 reviews
2 Stars - 1 reviews
3 Stars - 1 reviews
4 Stars - 2 reviews
5 Stars - 6 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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3 out of 5 stars

December 27, 2022

Karoo 2 - Did Not Meet Expectations

I've used it once or twice and have initial impressions

I returned this product this morning. I purchased the Karoo 2 anticipating that it would be a great replacement for my aging Garmin 830. Sadly, it was not! While it has many great features and an awesome screen the one feature that cause it to fall short for me was Live Tracking. In order to use Live Tracking on the Karoo 2 it must have an internet connection via an activated SIM card (user installed and purchased) or be tied to the hot spot on the users cell phone (likely gobbles data). With one of these activated the rider can be tracked through a unique URL link sent to the individual you choose to do the tracking. But, if you ever turn off live tracking the URL goes away and a new one must be generated and sent to your chosen tracker (very cumbersome). This is opposed to Garmin’s approach which does not require any SIM card, unique URL or action to re-establish tracking capability if you turn tracking off for a time. I am sure the Karoo 2 would be great for users who do not want to easily and inexpensively use Live Tracking but for me live tracking is an essential feature! Add to the Live Tracking shortfall the fact that Karoo 2 cannot provide connectivity to Shimano Di2 (not Hammerhead’s fault) and I just felt I was giving up too much to justify the $400 expenditure. So, I will stick with Garmin even though I found many things about the Karoo 2 appealing! If Hammerhead ever fixes these issues I will be eager to purchase!

gcgp774851 g
5 out of 5 stars

November 27, 2021

Best GPS

I've used it several times
Size Bought:
3' 2"

Best GPS with lots of advanced features. Screen colors are vivid and striking. Touch screen are accurate. Mapping or adding route is incredibly easy. A new world order for GPS is here.

1 out of 5 stars

November 18, 2021

Mediocre for MTB

I've used it several times

My biggest gripe with hammerhead is that they censor the reviews on their website. Only 4 & 5 star reviews show up. I left a 2 star review and it's not there. I'm pretty sure a few weeks ago there were some other 1-3 star reviews, but none now. I bought the device so I could have a map and my location handy and easy to use. The device and it's software is not designed for mountain biking use. It looks like it will work well for hard core trainers and road cyclists. It has some serious deficiencies which are important for a mountain biker who rides in non-urban areas. I'm going to try loading Locus, but if that doesn't work I'll have to send it back. The good: The screen visibility is good The touchscreen is good The buttons are good Major Deficiencies There is no way to create a route when offline. Many of us go camping and riding for days at a time and do not have wifi coverage. No way to create waypoints. One might want to create a waypoint to mark something of significance. This also might be a way to get around the lack of offline route creation ability. No way to load GPX tracks and show them on the map. One might be riding in an area that is not well mapped in OSM, but the tracks are available elsewhere. If one could load several tracks and display them this would work for those areas. No GPX tracks manager. It would be nice to load a lot of tracks and have a system to organize them in folders. No way to transfer a route or track directly from the phone. Minor Issues: The trail labels are too small. The trail widths are too thick, or in some cases, too thin. The mount hangs out and is prone to breakage. I had a fairly minor spill and the mount was broken.

brad H
2 out of 5 stars

September 19, 2021

Not user friendly

I returned this product before using it

There are way too many "do this then that," etc. Too many work arounds. Have used Wahoo and Garmin and both are much more intuitive

5 out of 5 stars

September 2, 2021

Sold for Life

I've put it through the wringer

I have been putting all of the features on this head unit through its paces this past month and I have to say it is nearly the perfect computer. Why nearly you ask? Because the hard working folks at Hammerhead are continually working to make it better. Not only that; they listen to their users' feedback through their members forum. That isn't the case with the other options on the market. Like many of us; we are going to do a lot of research before moving forward with a head unit purchase. I watched all the reviews I could find on YouTube by all the known names of reviewers. The down side was they were all from a year ago. I can tell you, this unit has grown in that year since its product release to what the unit is today. Let me go through the features of what most of use will want out of a head unit (I think) Training: Syncs with Training Peaks only so far. This has been the case since its release with the promise of other third party platforms coming on. That is still the promise; but it takes both parties (Hammerhead and the training platform) to make that agreement, I'll leave it at that. The workouts with Training Peaks is pretty awesome. Obviously personal preferences will vary; but the workout screen is simple but gives you the important information; power and time left. The workout screen is easy to read and see where you are in your interval. Down side; I wouldn't run a workout with a route. If you are going to use the workout screen; know where you're going. The unit works just fine and doesn't bog down. The screen just gets too cluttered. Along with the fact; if you are using the mapping feature and you come to a climb you will get the climb profile pop up too. It's just a lot going on. You can have other screens to look at like your averages and others. Just don't run routes while working out. The Maps: This is second to none and the biggest reason I wanted the Karoo 2; and can confirm, the map is amazing. It works amazingly in the wilderness. I have yet to use it in an urban setting as I am in remote Colorado. I set out on some local trails and this got me through single track trails in my area that I had never been on. It got me to one trail in particular that I was wanting to hit. You have to do some work while stopped; but it works very well. In my opinion; setting up new routes is easier on this device than on Wahoo. I use both Strava and RideWithGPS on my phone and computer. Transferring the maps is crazy simple to do. Once you complete your route, you "share" the map and copy the link. You go to the Hammerhead dashboard and paste into your routes and it is there, on your Karoo 2. You can do this from your phone's web browser. Which is just as good as an app; therefore you do not need an app. The browser dashboard is made to be a mobile website so loads very easily on your phone. To get it on your head unit from just your phone out in the wild (not on WiFi), you have to be able to use your phone as a hotspot and connect the Karoo 2 to your phone's hotspot. Living in the remote mountains, I just plan ahead and have my route ready and loaded. If you are in an urban area; so many WiFi options and better cell reception. Device Setup: Once again crazy simple to do. Since the software is based on the Android platform it sets up like a phone. There are similarities to the way you set this up and how you set up a Garmin head unit. Once again; you don't need an app to do this. The device is a phone,. In the sense of having data screens this device is more similar to Garmin than it is to Wahoo. Having been a predominant Garmin user; it wasn't that big of an adjustment for me. I've found all the data metric options I could possibly think of. But I do not train 20 hours a week anymore and take a little more relaxed approach towards training. All in all it covers all I could think one would need. I don't see myself looking for another head unit anytime in the near future. I'm sold on the Karoo 2.

Chris G
4 out of 5 stars

September 1, 2021


I've used it several times

Let me preface this review by stating I have been a loyal Wahoo user for years. I still maintain they make the best GPS computers for no-frills, ease of use, and functional design. With that said, wouldn't we all like a Tesla over a Civic? The Karoo 2 is the hottest new computer to challenge the big two in well, forever. Backed by a great team of engineers and excellent product support, you'll never feel outdated using this computer. As other reviewers have noted, the mapping features are second to none. You'll be awash in data customization options and aftermarket apps - it's truly a tech nerd's playground. Pros: Touchscreen - Works better than my iPhone X and it's 3x smaller. Enough said. Mapping - Easy to upload .gpx routes to the Hammerhead dashboard from 3rd party sources or you can make them yourself with web browser route planning. You can also easily pick out points on the map on the Karoo 2 and have yourself routed to them. Software Updates - Routinely pushed 2x/month and heavily based on user input. Cons: Lack of dedicated smartphone app - this will likely take most Garmin/Wahoo users some time to adjust to. The web app (dashboard.hammerhead.io) is a great place for creating your profile, editing routes, downloading user data, etc, but where the Karoo currently falls way short is a companion app for smartphones. Most riders are accustomed to uploading their ride data immediately to their smartphones, but unless you create a mobile hotspot or have a dedicated data plan sim card for your Karoo, you must wait till you're connected to Wi-Fi to sync data. Weight - it's not light. 132g to the Wahoo Roam's 96g. But for all intents and purposes, the Karoo is a small smartphone, so it's not exactly a direct comparison. Proprietary handlebar mount - Some folks don't really care about this point, but a lot of other riders have already invested money in a nice K-Edge mount. The Karoo does come with an adapter for Garmin mounts, but as of right now it's just not as secure a fit compared to the included Karoo mount. It would seem that the cons outweigh the pros based on my review, but I still stand by my enthusiasm for where Hammerhead is going. Based on their ethos of continuous improvement, I have no doubt these concerns will be addressed. The Karoo 2 is a feature-packed powerhouse of a computer that many will enjoy discovering and using to its full potential.

user image
Josh M
5 out of 5 stars

September 1, 2021

Best Bike Computer I've Ever Owned

I've put it through the wringer

I've owned bike computers for nearly 40 years, starting with a Cateye solar in 1985. I eventually moved to a Garmin Edge 500 (then 520) but found the software to be buggy and inconsistent, and the requirement to do all programming on device using buttons annoying. I moved to a Wahoo Elemnt, then Roam. The software and day-to-day usage was much easier and more sophisticated than the Garmin. However, The screen was not nearly as bright as shown on the box, even with brightness at max. I looked at a Stages computer, which has a fantastic screen, but interacting with the device is cumbersome. Enter the Karoo 2. The screen is the best I've ever seen and interacting with the device is good. The navigation is great and setup is easy. The software is evolving but it's good now, and it's fun to be part of the process. The Hammerhead team is fantastic and I've seen a couple of suggestions implemented. Still, the system remains a work in progress. If you want a polished, finished product, go with Wahoo or Garmin. However, if you want a screen that blows the others away, software that works well (albeit needs further development), and the fun of watching a product develop before your eyes, the Karoo 2 is da bomb!

Jonathan EGearhead
5 out of 5 stars

August 23, 2021

A Smart GPS!

"But is it better than a Garmin or Wahoo?" I'm sure that's what you are wanting to know. The short answer is, maybe. If you're a road rider I think this is the best GPS on the market right now. IMO the mapping is superior to Wahoo and right there with Garmin. I wish the mapping did a better job of showing singletrack trails for mountain biking and forest roads for gravel biking but this could be updated at some point. This brings me to my next topic. The Karoo 2 runs on Android 8 software so its potential is huge. If you are familiar with using an Android device then you'll be right at home using this GPS. You can also set up and use the device without having to use an app on your smartphone to upload rides since it can connect to a Wifi network. Pair it to your Strava account and your rides will very easily load once you are connected to the internet. You can even name your ride on the device using the touchscreen keyboard. Super neat. This is one area where it makes the competitors seem outdated. Then there's the screen. The resolution and color are phenomenal! And the touchscreen is more accurate than my last Android phone. No joke. Cons: My only complaint so far would be the battery life is not quite as good as my previous GPS, the Wahoo Roam, and the screen can be hard to see under direct sunlight. Also, if you are a weight weenie this computer isn't the lightest option. For me, I'll take the slightly heavier weight for the tech you get in return. Pros: Easy to set up and use once you get familiar with it. The color screen is great when not under direct sunlight. The mapping on the road is great. The climbing mode is a neat feature if you live in a mountainous state. Love that you don't need a companion app. In short, if you are looking for a new cycling GPS with a ton of features, give the new guy on the block a shot. I think you will be thoroughly impressed.

user image
5 out of 5 stars

July 2, 2021

Great device with very promising future

I've used it several times

This unit exceeded all the expectations i had and it keeps getting better with the bi-weekly software updates. The device itself is lightyears ahead of garmin and wahoo devices, software has some catching up to do but the hammerhead folks seem to be working with a mission to keep improving. First impressions are checking all the boxes with some concerns over battery life and maybe operating the screen in the rain. -Fields are much more vibrant and useful, -Routing, maps and screen are best in class. -Very user friendly and easy to change setting &options, the drawer feature is very useful and just makes sense. -Beeper can be a bit louder -dark screen isn't the best in bright conditions and white screen drains more battery -post ride view needs a serious re-design to have more useful information. It doesn't even list laps, but they show up on strava Again, the main selling point here is what this device can be, the hardware is very future proof and the hammerhead folks are rolling serious updates every two weeks, very promising

Abdelrahman E
5 out of 5 stars

May 31, 2021

Best on the Market

I've put it through the wringer

I purchased the Karoo 2 last year. It is nice to see that Completive Cyclist has it. They are always updating this beautiful piece of art. The Karoo 2 is hands down the best and giving Garmin & Yahoo a run for their money. Does hesitate and just get you one, I promise you will not be dissatisfied

Carlo G