# Sigma ROX 12.1 Evo vs Coros Dura: specs and price compared

A sourced, side-by-side comparison of the Sigma ROX 12.1 Evo (Sigma) and Coros Dura (Coros) among bike computers. Coros Dura is the cheaper of the two at $249.

## Side by side

| Spec | Sigma ROX 12.1 Evo | Coros Dura |
| --- | --- | --- |
| US price | $379.95 | $249 |
| Brand | Sigma | Coros |
| Released | 2023-06 | — |
| Display size (in) | 3.0 in | 2.7 in |
| Touchscreen | Yes | Yes |
| Battery life hours | 14 | 120 |
| Preloaded maps | Yes | Yes |
| Multiband gnss | No | Yes |
| Connectivity | ANT+, Bluetooth, Wi-Fi | ANT+, Bluetooth, Wi-Fi |
| Weight (g) | 112 | 102 |

## Key differences

- Display size (in): Sigma ROX 12.1 Evo 3.0 in vs Coros Dura 2.7 in
- Battery life hours: Sigma ROX 12.1 Evo 14 vs Coros Dura 120
- Multiband gnss: Sigma ROX 12.1 Evo No vs Coros Dura Yes
- Weight (g): Sigma ROX 12.1 Evo 112 vs Coros Dura 102

## What reviewers say

**Sigma ROX 12.1 Evo** — Only one whitelisted tester (BikeRadar) published a hands-on review of this exact model. BikeRadar rated it 2/5, praising easy route-following and rich training data but panning meagre battery life (10h with a heart rate monitor only; 4.5h navigating with sensors), a rain-triggered touchscreen, cheap build and an uncompetitive £379.95 price. (1 sourced review.)

**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

- Sigma ROX 12.1 Evo: https://sigma.bike/product/rox-12-1-evo/ (sigma.bike, verified 2026-06-19)
- Coros Dura: https://www.coros.com/dura (coros.com, verified 2026-07-10)

Canonical: https://frontdeskreview.com/gear/bike-computers/sigma-rox-12-1-evo-vs-coros-dura/
Cite: Per The Front Desk Review, Sigma ROX 12.1 Evo ($379.95) vs Coros Dura ($249) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/bike-computers/sigma-rox-12-1-evo-vs-coros-dura/
License: CC BY 4.0.