Skip to main content

4iiii PRECISION Shimano XTR M9100 Power Meter

Josh Matthew September 1, 2021


4iiii power for your Shimano’s XTR M9100 or M9120 crankset!

Clear selection

4iiii PRECISION Shimano XTR M9100 Power Meter

The 4iiii PRECISION Shimano XTR M9100 Power Meter is brings power to your M9100 or M9120 crankset. The 4iiii PRECISION power meter is a left-only crank arm-based power meter and replaces your current left side crank arm. It takes the power that is generated by your left leg and doubles it in order to determine your total power output.

Using 3D power meter technology capable of measuring tri-axial strain, the 4iiii XTR M9100 Power Meter is accurate to +/- 1.0%. In addition, it’s very lightweight, adding only 9 grams of weight to your crankset.

It features 100 hours of battery life and is compatible with both ANT+ and Bluetooth SMART devices. This means it’s compatible with your favorite bike computer, smart phone or tablet.



Most Affordable DFPM

The 4iiii PRECISION is one of the most affordable, ready to ride direct force power meters available.

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.


The power meter is available in the following crank arm lengths: 170 mm | 175 mm



The 4iiii power meter is compatible with XTR M9100/9120/9130 cranksets. It is also compatible with all other Shimano x100/x120/x130 series MTB cranksets such as the XT M8100/M8120/M8130 or the SLX M7100/7120/7130.

It is not compatible with x000 series crankset such as the XTR M9000’s, XT M8000’s or SLX M7000’s.

Please note, this product requires a Shimano Crankarm Cap Tool (sold by us separately) for installation.


Tools Needed for Installation

  • 8 mm Allen key


In the Box

  • 4iiii PRECISION Power Meter
  • 2 2032 coin cell batteries
  • Quick Start guide


4iiii PRECISION Shimano XTR M9100 Specs

Name4iiii PRECISION XTR M9100
Bike TypeMTB
Location of Power MeasurementCrank Arm
Left or Both Legs MeasuredLeft only
Independent Left/Right MeasurementNo
Communication ProtocolANT+ and Bluetooth SMART
Claimed Accuracy+/- 1.0%
Weight9 grams (added weight)
Battery TypeCR2032 coin cell
Battery Life100 hours
Method of Cadence MeasurementAccelerometer
Warranty3 years



There are no reviews yet.

Be the first to review “4iiii PRECISION Shimano XTR M9100 Power Meter”

Shopping Cart