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Why choose Powermetershop?
- Order number: SW11011.4
The 4iiii Precision 3+ PRO Shimano Ultegra R8100 is a dual-sided power meter delivered as a complete Shimano Ultegra R8100 crankset. It is built for road riders who want to measure not only total power but also the contribution of each leg separately. Compared with single-sided systems, it adds deeper pedaling analysis and gives a more detailed basis for structured training and racing.
Strengths and weaknesses
- Dual-sided power measurement with high accuracy (± 1%).
- Left-right balance, pedal smoothness and torque effectiveness.
- Up to 550 hours of battery life with a CR2032 battery.
- Only about 29 g added weight for the dual-sided configuration.
- ANT+ and Bluetooth for bike computers, smartwatches and indoor apps.
- Apple Find My built in.
- Active temperature compensation and automatic terrain detection.
- IPX7 water resistance and 3-year manufacturer warranty.
- Complete Shimano Ultegra R8100 crankset including 12-speed chainrings.
- Higher price than the single-sided version.
- Shorter battery life than the left-side Precision 3+.
- Compatible only with Shimano road setups using the 24 mm bottom bracket standard.
- Frames with very wide or flared bottom bracket areas should be checked for right-side clearance.
Who this model suits
This model suits riders who want more than total power numbers. If you want to analyse sprinting, seated and standing efforts, threshold work or differences between left and right leg contribution in more detail, the PRO version offers clear added value over a single-sided power meter. The clean integration into a complete Ultegra R8100 crankset is also a practical advantage on performance-focused road bikes.
How the PRO version differs
The PRO version measures both sides separately and goes beyond total power data. It adds left-right balance, pedal smoothness and torque effectiveness for riders who want deeper analysis of their pedaling mechanics. That makes it the more suitable option for riders who want more than a left crank arm solution.
Construction and compatibility
This product includes a complete Shimano Ultegra R8100 crankset with pre-installed power meter technology and 12-speed chainrings. The left sensor sits on the crank arm, while the drive-side measurement is integrated into the right crank or spider system. The setup is intended for Shimano road bikes using a 24 mm bottom bracket standard, and installation requires the Shimano TL-FC16 tool.
Performance in daily use
With up to 550 hours of battery life, the system is designed for long-term use even though runtime is lower than on the single-sided version. Data is transmitted via ANT+ and Bluetooth, and the system also includes active temperature compensation, automatic terrain detection and Apple Find My for Apple users. IPX7 water resistance and a 3-year warranty make it suitable for regular riding in changing conditions.
Specifications
|
Measurement location: |
Both sides separately |
|
Accuracy: |
± 1% |
|
Weight: |
Approx. 29 g added weight |
|
Battery: |
CR2032 |
|
Battery life: |
Up to 550 h |
|
Battery replacement: |
With 2 mm hex key |
|
Data transmission: |
ANT+, Bluetooth |
|
Firmware updates: |
Wireless via app |
|
Power range: |
0 to 4000 watts |
|
Cadence range: |
30 to 170 rpm |
|
Water resistance: |
IPX7 |
|
Operating temperature: |
0 to 50 °C |
|
Storage temperature: |
-40 to 60 °C |
|
Extra metrics: |
Left-right balance, pedal smoothness, torque effectiveness, Apple Find My, automatic terrain detection, active temperature compensation |
|
Compatibility: |
Shimano Ultegra FC-R8100, Shimano road 24 mm bottom bracket standard |
|
Available lengths: |
165, 170, 172.5, 175 mm |
|
Warranty: |
3 years |
What's included
✔ 4iiii Precision 3+ PRO power meter
✔ Shimano Ultegra R8100 crankset
✔ Shimano 12-speed chainrings
✔ CR2032 battery
✔ User manual
FAQ about the 4iiii Precision 3+ PRO Shimano Ultegra R8100
Question: What is the main difference compared with the single-sided version?
Answer: The PRO version measures both legs separately and adds left-right balance plus further pedaling metrics.
Question: Is this a complete crankset or only a left crank arm?
Answer: It is supplied as a complete Shimano Ultegra R8100 crankset with pre-installed power meter technology.
Question: Who benefits most from the dual-sided version?
Answer: Riders who want more detailed analysis and separate data for both legs.
Manufacturer
4iiii Innovations Inc.
141 2 Ave E
T4C 2B9 Cochrane Alberta
Canada
Person responsible for the EU:
2moso BV
Zwarte Zee 2
3144 DE Maassluis
Netherlands
E-Mail: contact@2moso.com
EAN: 0628308550760
MPN: PMD300-S18C01X
Product safety
Specific safety information that applies to this product can be found in the operating instructions for the product.
| Crank manufacturer: | Shimano |
| Carbon or aluminum: | Aluminum |
| Single or double sided: | left side |
| Road or MTB: | Road |
