4iiii PRECISION PRO Shimano Ultegra R8000 Dual-Sided CranksetJosh Matthew October 15, 2021
4iiii’s 3-D tri-axial strain gauge technology, dual-sided power and +/- 1.5% accuracy
4iiii PRECISION PRO Shimano Ultegra R8000 Dual-Sided Crankset
The 4iiii PRECISION PRO Shimano Ultegra R8000 Dual-Sided Crankset combines 4iiii’s patent pending 3-D tri-axial strain gauge technology with Shimano’s best-selling Ultegra R8000 crank. The result is an accurate, lightweight and highly reliable power meter crankset that is capable of tacking the most grueling workouts or races.
The dual-sided 4iiii R8000 crankset also features independent left/right power measurement. With a power sensor located on the inside of both crank arms, the power meter can measure the forces generated by each leg individually.
The 4iiii is also extremely lightweight, adding approximately 20 grams to the Shimano R8000 crankset. The power meter is compatible with both ANT+ and Bluetooth SMART devices and is accurate to +/- 1.0%.
4iiii Dual-Sided Power Meter Options
- Chainrings: 50/34 | 52/36 | 53/39
- Crank arm lengths: 165 mm | 170 mm | 172.5 mm | 175 mm
This power meter uses a 24 mm Shimano road spindle. Therefore, it is compatible with almost any bike when used with the correct bottom bracket.
Please note, this product requires a Shimano Crankarm Cap Tool (sold by us separately) for installation.
Tools Needed for Installation
- Shimano Crank Arm Cap Tool (sold by us separately)
- 5 mm Allen key
In the Box
- 4iiii Dual-Sided Crankset
- 2 CR2032 batteries
- Quick Start guide
4iiii PRECISION PRO Shimano Ultegra R8000 Crankset Specs
|Name||4iiii PRECISION PRO R8000 Crank|
|Location of Power Measurement||Crank arm|
|Left or Both Legs Measured||Both|
|Independent Left/Right Measurement||Yes|
|Installation||More involved (60 min. estimated)|
|Communication Protocol||ANT+ and Bluetooth SMART|
|Claimed Accuracy||+/- 1.0%|
|Weight||694 grams (170 mm, 50-34T)|
|Battery Life||100 hours|
|Method of Cadence Measurement||Accelerometer|