4iiii
4iiii Precision 3+
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Best Cycling Power Meters · head-to-head
4iiii Precision 3+ vs Sigeyi AXO SL
A sourced, side-by-side comparison. Sigeyi AXO SL is cheaper at $389.5. Every spec and price links to its source.
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Sigeyi
Sigeyi AXO SL
$389.5
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | 4iiii Precision 3+ | Sigeyi AXO SL |
|---|---|---|
| US price | — | $389.5 |
| Brand | 4iiii | Sigeyi |
| Released | — | — |
| Mount type | crank-arm | spider |
| Measurement sides | single-sided | — |
| Accuracy pct | 1 | 1 |
| Weight grams | 9 | — |
| Battery type | CR2032 | rechargeable-liion |
| Battery life hrs | 800 | 300 |
| Connectivity | ANT+/BLE | ANT+/BLE |
| Power balance measured | No | No |
| Cycling dynamics | Yes | Yes |
| Waterproof rating | IPX7 | IP67 |
| Warranty years | 3 | 2 |
Sources — 4iiii Precision 3+: 4iiii.com (verified 2026-07-13). Sigeyi AXO SL: sigeyishop.com (verified 2026-07-13).
What's the difference between the 4iiii Precision 3+ and Sigeyi AXO SL?
Where the two actually differ on the specs we track (5 of 11). Matching specs are omitted.
- Mount type: 4iiii Precision 3+ crank-arm vs Sigeyi AXO SL spider
- Battery type: 4iiii Precision 3+ CR2032 vs Sigeyi AXO SL rechargeable-liion
- Battery life hrs: 4iiii Precision 3+ 800 vs Sigeyi AXO SL 300
- Waterproof rating: 4iiii Precision 3+ IPX7 vs Sigeyi AXO SL IP67
- Warranty years: 4iiii Precision 3+ 3 vs Sigeyi AXO SL 2