Already ridden - parts in a short testGPS computer, lightweight wheels & GPS mount

Max Fuchs

, Jens Klötzer

 · 08.09.2024

The Hammerhead Karoo 3 bike computer ...
Photo: Georg Grieshaber

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The new product season always brings excitement to the test department. We rode the Hammerhead Karoo GPS computer, a smart GPS mount.

Feua Flex Base Mount

19,99 Euro / 8 gram

The Flex Mount Base is simply glued onto the top tubePhoto: Max FuchsThe Flex Mount Base is simply glued onto the top tube

If you need to keep an eye on your navigation at all times on long tours, you usually mount your bike computer on the stem. This is simply the best place to keep an eye on the screen. In tough off-road use, however, this mounting has a disadvantage: in the event of a fall, the expensive electronics - exposed to impacts without protection - jam on the cockpit. This is where the Flex Base Mount comes into play. Thanks to the flexible and self-adhesive TPU plate (48 x 32 mm) with quarter-turn mount, Garmin and co. can be attached to the top tube in a protected position. Our verdict after tough bike park use and bike washing with the steam cleaner: it holds firmly, is highly visible and looks stylish.

Holds bombproof, good visibility and looks stylishPhoto: Stefan FreyHolds bombproof, good visibility and looks stylish

Hammerhead Karoo 3 bike computer

118/39 grams (computer/holder), 500 euros >> available here

With the Hammerhead, competition for top dog Garmin comes from the Sram universePhoto: Georg GrieshaberWith the Hammerhead, competition for top dog Garmin comes from the Sram universe

Sram includes a revised Hammerhead Karoo bike computer with the new Red AXS road bike groupset. The device is also available separately and is of course also compatible with mountain bike components from the AXS range. Their seamless integration into the Hammerhead makes many things convenient: the display can be used to keep an eye on the charge status of the batteries on the derailleur or dropper post, the values of the power meter or the air pressure in the tyres, provided the corresponding sensors are installed. These are quickly and intuitively connected. But even without SRAM components, the Karoo is a recommendable alternative to the top dogs Garmin or Wahoo.

We were impressed by the new touch display, which is easy to read and operate in all conditions, even in the rain. Before the tour, the quick and intuitive route planning via the associated software on the PC is impressive: different surfaces can be selected and excellent maps are stored, for example Open Cycle Maps, which also display cycle paths. The tours are downloaded to the computer fully automatically and can be managed and viewed directly on the PC after the tour - without manual downloading. Data such as speed, pedalling power, cadence or the gears ridden can then be tracked in user-selectable segments. The battery power of the bike computer remains a shortcoming, even though the battery has been slightly enlarged: More than one riding day is not possible with navigation switched on. And the price: the Hammerhead costs 500 euros.

The mount does not fit 35-millimetre handlebars. However, the Karoo 3 can be mounted on Garmin mounts using an adapterPhoto: Georg GrieshaberThe mount does not fit 35-millimetre handlebars. However, the Karoo 3 can be mounted on Garmin mounts using an adapter

+ Top display; integration in AXS environment; easy-to-use software for route planning

- Relatively expensive; battery performance could be better

Even without Sram components, the Karoo is a recommendable alternative to the top dogs Garmin or WahooPhoto: Stefan FreyEven without Sram components, the Karoo is a recommendable alternative to the top dogs Garmin or Wahoo

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Max Fuchs

Max Fuchs

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Max Fuchs hat seine ersten Mountainbike-Kilometer bereits mit drei Jahren gesammelt. Zunächst Hobby-Rennfahrer und Worldcup-Fotograf im Cross-Country-Zirkus, jetzt Testredakteur und Fotograf bei BIKE. Sein Herz schlägt für Enduros und abfahrtsstarke Trailbikes – gern auch mit Motor. Bei der Streckenwahl gilt: je steiler und technischer, desto besser.

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