# Hammerhead Karoo 3 vs Coros Dura: specs and price compared

A sourced, side-by-side comparison of the Hammerhead Karoo 3 (Hammerhead) and Coros Dura (Coros) among bike computers. Coros Dura is the cheaper of the two at $249.

## Side by side

| Spec | Hammerhead Karoo 3 | Coros Dura |
| --- | --- | --- |
| US price | $524.99 | $249 |
| Brand | Hammerhead | Coros |
| Released | 2024-05 | — |
| Display size (in) | 3.2 in | 2.7 in |
| Touchscreen | Yes | Yes |
| Battery life hours | 15 | 120 |
| Preloaded maps | Yes | Yes |
| Multiband gnss | Yes | Yes |
| Connectivity | ANT+, Bluetooth, Wi-Fi | ANT+, Bluetooth, Wi-Fi |
| Weight (g) | 118 | 102 |

## Key differences

- Display size (in): Hammerhead Karoo 3 3.2 in vs Coros Dura 2.7 in
- Battery life hours: Hammerhead Karoo 3 15 vs Coros Dura 120
- Weight (g): Hammerhead Karoo 3 118 vs Coros Dura 102

## What reviewers say

**Hammerhead Karoo 3** — Both whitelisted testers reviewed the Karoo 3. DC Rainmaker ran multi-month, side-by-side testing against the Garmin Edge 840 and Wahoo ROAM V2 (GPS/elevation data plots, battery-burn charts). Cycling Weekly did a hands-on but qualitative test on a Morocco ride, with no measured metrics. Both praise navigation and user-friendliness and call it a legitimate Garmin/Wahoo rival. Both note it is not meaningfully faster / slow to power up despite the new processor and RAM. On battery they diverge: Cycling Weekly found the 15+hr claim falls short in real use, while DC Rainmaker found the claimed ~30% improvement roughly holds (about 12-13hr realistic). No RTINGS or lab-benchmark source exists for this model. (2 sourced reviews.)

**Coros Dura** — Genuine verdict: two whitelisted outlets — Cycling Weekly's 7-month review and DC Rainmaker (a 2024 pre-release hands-on plus a 2026 measured battery test) — agree the Dura's standout is class-leading solar battery life at a low $249 price, undercut by bare-bones mapping and unreliable, app-dependent rerouting. Non-whitelisted bike sites like BikeRadar and Velo were excluded. (3 sourced reviews.)

## Sources

- Hammerhead Karoo 3: https://shop.sram.com/collections/cockpit-and-controls/products/karoo (shop.sram.com, verified 2026-06-19)
- Coros Dura: https://www.coros.com/dura (coros.com, verified 2026-07-10)

Canonical: https://frontdeskreview.com/gear/bike-computers/hammerhead-karoo-3-vs-coros-dura/
Cite: Per The Front Desk Review, Hammerhead Karoo 3 ($524.99) vs Coros Dura ($249) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/bike-computers/hammerhead-karoo-3-vs-coros-dura/
License: CC BY 4.0.