Most Affordable DFPM
The 4iiii PRECISION is one of the most affordable, ready to ride direct force power meters available.
4iiii PRECISION Shimano GRX RX810 Power Meter
*Due to the wide variety of Crank Arms, Wheelworks will do special orders for power meters. 5-7 Business Days
Introducing the all new 4iiii PRECISION Shimano GRX RX810 Power Meter. 4iiii has combined their patent pending 3-D tri-axial strain gauge technology, measured at +/- 1.0% accuracy, with Shimano’s GRX RX810 groupset. The result is one of the lightest, most affordable and most accurate direct force power meters available for gravel and adventure riders.
The 4iiii power meter measures left leg power and doubles this value to determine your total power. This left-only design allows for a power meter that is affordable, lightweight and easy to install. The power meter adds only 9 grams to your crank arm and is installed in about 10 minutes. In addition, the PRECISION is compatible with both ANT+ and Bluetooth SMART devices. This means you can use it with your favorite bicycle computer, watch or smart phone.
Highlights
High Level of Accuracy
The PRECISION is accurate to within +/- 1.0%. This compares to average accuracy of +/- 1.0-2.0% for most other power meters.
Lightest Power Meter
At only 9 grams of added weight, the PRECISION is the lightest power meter you can buy!
Easy to Install
Installation is a breeze. Just swap it out for your current left-side crank arm and you’re ready to ride! Installation takes minutes…not hours.
ANT+ & Bluetooth SMART
The power meter transmits data via both ANT+ and Bluetooth SMART so you can use it with a wide range of devices.
Options
The power meter is available in the following crank arm lengths: 170 mm | 172.5 mm | 175 mm
Compatibility
The 4iiii power meter is compatible with all Shimano GRX cranksets including GRX RX600.
Please note, this product requires a Shimano Crankarm Cap Tool (sold by us separately) for installation.
In the Box
- 4iiii PRECISION Shimano GRX RX810 Power Meter
- CR2032 Battery
- Quick Start guide
4iiii PRECISION Shimano GRX RX810 Specs
| Name | 4iiii PRECISION GRX RX810 |
| Bike Type | Gravel |
| Location of Power Measurement | Crank Arm |
| Left or Both Legs Measured | Left only |
| Independent Left/Right Measurement | No |
| Installation | Easy |
| Communication Protocol | ANT+ and Bluetooth SMART |
| Claimed Accuracy | +/- 1.0% |
| Weight | 9 grams (added weight) |
| Battery Type | CR2032 coin cell |
| Battery Life | 100 hours |
| Method of Cadence Measurement | Accelerometer |
| Warranty | 3 years |