Garmin, Wahoo, Coros, or Hammerhead? Choosing your cockpit computer

Twenty-five years is a long arc—from the yellow Garmin eTrex in the Australian outback to Epix Pro, Wahoo Roam, Coros Dura, and Hammerhead Karoo 3. Each shines in different scenarios; here is my personal cut.

Transparency: I buy and run the head units and watch myself; no manufacturer payment for this article.

The core: Garmin Epix Pro as data hub

Whatever is mounted on the handlebars, my Garmin Epix Pro is always running. It is my central data store across sports.

The decisive advantage is battery life. Garmin effectively uses the Enduro-series battery approach here, so the watch lasts an extremely long time even under heavy use. That is also why I have not moved to the Fenix 8 yet—for endurance, this setup is unbeatable for me. The watch acts as backup and health monitor in the background while the “action” lives on the head units.

Why I don’t use a Garmin head unit

I have run countless Garmin head units over many years—they really are good. Eventually the nested menu structure annoyed me enough that I moved away from Garmin on the handlebars entirely, aside from the Epix Pro on my wrist, which stays fairly intuitive. Price-wise Garmin often sits high for me; without the old manufacturer support, the trade-offs land differently.

Hammerhead Karoo 3: smartphone-grade feel

For structured workouts or shorter, intense rides I usually reach for the Hammerhead Karoo 3.

• Display & interaction: The screen is the best the market offers right now. Sharpness and colour feel closer to a modern smartphone than a classic bike computer.
• Configuration: The Android-based OS makes operation very fluid. Sideloaded apps are particularly interesting, making the Karoo highly versatile.
• UX: Despite the depth of features, menus stay logical and intuitive.

Battery life: Compared with the previous Karoo (which I also used), the Karoo 3 is noticeably better. In practice, though, roughly ten hours effective runtime still leaves it behind typical Garmin or Wahoo head units—let alone the Coros Dura.

Wahoo Roam v2: intuitive simplicity

The Wahoo Roam v2 remains the king of usability for me. Mapping looks minimal next to the Karoo or Garmin topo, but it wins elsewhere:

• Perfect View Zoom: Brilliant and, in my experience, unmatched—toggle more or fewer data fields at the press of a button, which helps on the bike, especially when tired.
• Readability: In direct sun the Roam v2 display is outstanding.
• Setup: Configuration through the companion phone app is exemplary and avoids tedious drilling through submenus on the device.

Coros Dura: a game changer for ultracycling

The Coros Dura is a newcomer that reshuffles the deck for bikepacking and ultra distances.

• Battery life: Coros plays in its own league. Efficient power management plus a built-in solar cell that trickle-charges in sunlight (not a huge amount, but noticeable) means charging barely crosses my mind.
• Digital crown: The scroll wheel works perfectly in summer and winter, even with thick gloves.
• App integration: Like Wahoo, most setup happens in the app, which is very comfortable.

Backlight: On the modest side—awkward in poor light, but not a deal-breaker. A notch brighter would help; that would of course cost battery life.

One safety note: all of these devices pair cleanly with my Garmin Varia radar. That safety layer has become non-negotiable for me, whichever ecosystem I am using.

Conclusion: my NorthCape4000 setup

Head unit choice is always about use case. The Karoo 3 shines on tech finesse, the Wahoo on simplicity, and the Coros Dura is the workhorse for the really long days.

For my upcoming NorthCape4000 2026 (intermediate start from Berlin, about 3,000 km), the decision is set: the Coros Dura will be my primary navigator—many days without a recharge in real use, which is exactly why I chose it. As a safety backup I will carry the Wahoo Roam—covered from Berlin to the North Cape.