Bryton
Bryton Rider S800
$399.95
Released 2022
Best Bike Computers · head-to-head
Bryton Rider S800 vs Sigma ROX 12.1 Evo
A sourced, side-by-side comparison. Sigma ROX 12.1 Evo is cheaper at $379.95. Every spec and price links to its source.
Sigma
Sigma ROX 12.1 Evo
$379.95Cheaper
Released 2023-06
Which is better: the Bryton Rider S800 or Sigma ROX 12.1 Evo?
The Bryton Rider S800 wins 1 of the 1 specs we compare head to head; the other wins 0. The Sigma ROX 12.1 Evo is the cheaper at $379.95. Get the Bryton Rider S800 for the stronger spec sheet, the Sigma ROX 12.1 Evo to spend less.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Bryton Rider S800 | Sigma ROX 12.1 Evo |
|---|---|---|
| US price | $399.95 | $379.95 MSRP, basic set (device + mount) |
| 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 |
| Release | 2022 | 2023-06 |
Sources — Bryton Rider S800: global.brytonsport.com (verified 2026-06-19). Sigma ROX 12.1 Evo: sigma.bike (verified 2026-06-19).
What's the difference between the Bryton Rider S800 and Sigma ROX 12.1 Evo?
Where the two actually differ on the specs we track (3 of 7). Matching specs are omitted.
- 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
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
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.)
Praised: Big, bright, responsive 3.4in colour touchscreen; Long battery life; needs charging only about once a week; Rich features and data options for climbing and intervals (Climb Challenge).
Flagged: Bryton Active app is poorly laid out, unattractive and hard to navigate; Slow, unreliable data sync between app and head unit (reviewer resorted to a laptop); One unexplained mid-ride freeze lost two hours of training data.
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, 1 lab-tested.)
Praised: Easy-to-follow turn-by-turn navigation and clear routing; Data-rich training metrics with a capable companion app.
Flagged: Meagre battery life, far below the claimed 14 hours; Touchscreen misbehaves in rain, skipping pages and changing settings; Uncompetitive £379.95 price versus Garmin/Wahoo rivals.