# 4iiii Precision 3+ vs Stages Power LR Shimano Ultegra R8100: specs and price compared

A sourced, side-by-side comparison of the 4iiii Precision 3+ (4iiii) and Stages Power LR Shimano Ultegra R8100 (Stages) among cycling power meters.

## Side by side

| Spec | 4iiii Precision 3+ | Stages Power LR Shimano Ultegra R8100 |
| --- | --- | --- |
| US price | not published | $864.99 |
| Brand | 4iiii | Stages |
| Mount type | crank-arm | crank-arm |
| Measurement sides | single-sided | dual-sided |
| Accuracy pct | 1 | 1.5 |
| Weight grams | 9 | 15 |
| Battery type | CR2032 | CR2032 |
| Battery life hrs | 800 | 175 |
| Connectivity | ANT+/BLE | ANT+/BLE |
| Power balance measured | No | Yes |
| Cycling dynamics | Yes | — |
| Waterproof rating | IPX7 | IPX7 |
| Warranty years | 3 | — |

## Key differences

- Measurement sides: 4iiii Precision 3+ single-sided vs Stages Power LR Shimano Ultegra R8100 dual-sided
- Accuracy pct: 4iiii Precision 3+ 1 vs Stages Power LR Shimano Ultegra R8100 1.5
- Weight grams: 4iiii Precision 3+ 9 vs Stages Power LR Shimano Ultegra R8100 15
- Battery life hrs: 4iiii Precision 3+ 800 vs Stages Power LR Shimano Ultegra R8100 175
- Power balance measured: 4iiii Precision 3+ No vs Stages Power LR Shimano Ultegra R8100 Yes

## Sources

- 4iiii Precision 3+: https://4iiii.com/precision-3-plus/ (4iiii.com, verified 2026-07-13)
- Stages Power LR Shimano Ultegra R8100: https://stagescycling.com/en_us/stages-power-lr-shimano-ultegra-r8100-dual-sided-power-meter (stagescycling.com, verified 2026-07-13)

Canonical: https://frontdeskreview.com/gear/cycling-power-meters/4iiii-precision-3-plus-vs-stages-power-lr-ultegra-r8100/
Cite: Per The Front Desk Review, 4iiii Precision 3+ (not published) vs Stages Power LR Shimano Ultegra R8100 ($864.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/cycling-power-meters/4iiii-precision-3-plus-vs-stages-power-lr-ultegra-r8100/
License: CC BY 4.0.