Wahoo
Wahoo Elemnt Bolt V2
$279.99Cheaper
Released 2021-05
Best Bike Computers · head-to-head
Wahoo Elemnt Bolt V2 vs Sigma ROX 12.1 Evo
A sourced, side-by-side comparison. Wahoo Elemnt Bolt V2 is cheaper at $279.99. Every spec and price links to its source.
Sigma
Sigma ROX 12.1 Evo
$379.95
Released 2023-06
Which is better: the Wahoo Elemnt Bolt V2 or Sigma ROX 12.1 Evo?
The Wahoo Elemnt Bolt V2 wins 1 of the 1 specs we compare head to head; the other wins 0. The Wahoo Elemnt Bolt V2 is the cheaper at $279.99. The Wahoo Elemnt Bolt V2 both leads on specs and costs less — the straightforward pick.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Wahoo Elemnt Bolt V2 | Sigma ROX 12.1 Evo |
|---|---|---|
| US price | $279.99 | $379.95 MSRP, basic set (device + mount) |
| Brand | Wahoo | Sigma |
| Released | 2021-05 | 2023-06 |
| Display size (in) | 2.2 in | 3.0 in |
| Touchscreen | No | Yes |
| Battery life hours | 15 | 14 |
| Preloaded maps | Yes | Yes |
| Multiband gnss | No | No |
| Connectivity | ANT+, Bluetooth, Wi-Fi | ANT+, Bluetooth, Wi-Fi |
| Weight (g) | 70 | 112 |
| Release | 2021-05 | 2023-06 |
Sources — Wahoo Elemnt Bolt V2: support.wahoofitness.com (verified 2026-06-19). Sigma ROX 12.1 Evo: sigma.bike (verified 2026-06-19).
What's the difference between the Wahoo Elemnt Bolt V2 and Sigma ROX 12.1 Evo?
Where the two actually differ on the specs we track (4 of 7). Matching specs are omitted.
- Display size (in): Wahoo Elemnt Bolt V2 2.2 in vs Sigma ROX 12.1 Evo 3.0 in
- Touchscreen: Wahoo Elemnt Bolt V2 false vs Sigma ROX 12.1 Evo true
- Battery life hours: Wahoo Elemnt Bolt V2 15 vs Sigma ROX 12.1 Evo 14
- Weight (g): Wahoo Elemnt Bolt V2 70 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.
Wahoo Elemnt Bolt V2
Two whitelisted testers cover the V2. Cycling Weekly's year-later long-term test (Sept 2022) calls it user-friendly and accurate, nailing everything but navigation refinement. DC Rainmaker's launch-window review-in-progress (May 2021) hit severe firmware bugs: crashes, sensor dropouts, and delayed turn cues. The verdict splits sharply on reliability, and that split tracks the test date. (2 sourced reviews, 2 lab-tested.)
Praised: 64-colour screen used tastefully; its coloring bests the pricier Roam; 16GB onboard storage with full routable maps preloaded; Simple setup and intuitive, user-friendly operation.
Flagged: Navigation not fully refined; can reroute onto gravel and on-screen position lags at speed; Early-firmware instability: crashes, sensor dropouts, delayed turn cues; 15-hour battery shorter than the Roam and rival units.
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.