# Bryton Rider S800 vs Sigma ROX 12.1 Evo: specs and price compared

A sourced, side-by-side comparison of the Bryton Rider S800 (Bryton) and Sigma ROX 12.1 Evo (Sigma) among bike computers. Sigma ROX 12.1 Evo is the cheaper of the two at $379.95.

## Side by side

| Spec | Bryton Rider S800 | Sigma ROX 12.1 Evo |
| --- | --- | --- |
| US price | $399.95 | $379.95 |
| Brand | Bryton | Sigma |
| Released | 2022 | 2023-06 |
| Display size (in) | 3.4 in | 3.0 in |
| Touchscreen | Yes | Yes |
| Battery life hours | 36 | 14 |
| Preloaded maps | Yes | Yes |
| Multiband gnss | No | No |
| Connectivity | ANT+, Bluetooth, Wi-Fi | ANT+, Bluetooth, Wi-Fi |
| Weight (g) | 106 | 112 |

## Key differences

- Display size (in): Bryton Rider S800 3.4 in vs Sigma ROX 12.1 Evo 3.0 in
- Battery life hours: Bryton Rider S800 36 vs Sigma ROX 12.1 Evo 14
- Weight (g): Bryton Rider S800 106 vs Sigma ROX 12.1 Evo 112

## What reviewers say

**Bryton Rider S800** — Only one whitelisted tester (Cycling Weekly) published a hands-on review of this exact model; DC Rainmaker, TechRadar and Digital Trends had none. It praises excellent hardware — a bright 3.4in touchscreen, roughly week-long battery, and rich climb/interval data (Climb Challenge) — but pans the Bryton Active app as the worst mobile app the reviewer has ever seen, plus one unexplained mid-ride freeze that lost two hours of data. (1 sourced review.)

**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.)

## Sources

- Bryton Rider S800: https://global.brytonsport.com/products/rider-s800 (global.brytonsport.com, verified 2026-06-19)
- Sigma ROX 12.1 Evo: https://sigma.bike/product/rox-12-1-evo/ (sigma.bike, verified 2026-06-19)

Canonical: https://frontdeskreview.com/gear/bike-computers/bryton-rider-s800-vs-sigma-rox-12-1-evo/
Cite: Per The Front Desk Review, Bryton Rider S800 ($399.95) vs Sigma ROX 12.1 Evo ($379.95) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/bike-computers/bryton-rider-s800-vs-sigma-rox-12-1-evo/
License: CC BY 4.0.