Reviewed - Power Meter Crank Arms

All the power meters featured in this category acquire their power measurement from one side only. Currently all the products listed below monitor power from the LEFT leg. Most power monitors will simply DOUBLE the wattage from the left leg to give an average total power output. What can't be measured with these power meters is LEFT and RIGHT power balance. The best way to do this is with power pedals or other dual sided power metering systems.

However, for a vast majority of cyclists this averaged TOTAL POWER is more than adequate. These single sided power meters are some of the most popular on the market due to their ease of fitting, accuracy and low price (compared to pedals/chainring systems)

The Rotor 2INPower has been included in this category as it features strain gauges in the RIGHT crank arm as well as the axle spindle, measuring LEFT leg power. This 2INPower is a TOP END product and best suited to elite cyclists looking to add power metering to Rotor's Q-Ring chainrings.


The Best Crank Arm Power Meters - 2017

  • This power meter is compatible with ANT+ devices
    This power meter is compatible with Bluetooth devices
    This power meter measures power from the LEFT side
    Medium priced option
    Easty to fit with limited mechanic skills

    4iiii Precision Power Meter

    A very popular single sided power meter. The 4iiii Precision Power crank transmits power and cadence data to any compatible ANT+ or Bluetooth 4.0 (Smart) device. A genuine Shimano Ultegra crank is used to house the sensitive 4iiii strain gauges that provide the accurate power measurement ....

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  • This power meter is compatible with ANT+ devices
    This power meter is compatible with Bluetooth devices
    This power meter measures power from the LEFT side
    Lowest price option
    Easty to fit with limited mechanic skills

    Stages G2 Power Meter

    An easy and cost effective alternative to the power meter pedals of PowerTap and Garmin. The Stages G2 Power Meter cranks have their strain gauge and transmitter built-in to the rear side of the pedal. This is a SINGLE sided solution. The Stages power cranks transmit in both ANT+ and Bluetooth ...

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  • This power meter is compatible with ANT+ devices
    This power meter measures power from the LEFT side
    Medium priced option
    Easty to fit with limited mechanic skills

    Pioneer Power Meter

    These Pioneer power meter cranks, when paired with the Pioneer head unit, give some of the most detailed feedback available from a single sided power meter. However, when used with a Garmin or other ANT+ head unit they provide only the same data available from other cheaper and lighter power cranks ....

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  • This power meter is compatible with ANT+ devices
    This power meter is compatible with Bluetooth devices
    This power meter measures power from BOTH legs
    Most expensive option
    Moderate skills required - may require tools & assistance

    4iiii Precision Dual sided

    This is the dual sided power meter from 4iiii with strain gauges hidden away in both LEFT and RIGHT crank arms. Having two isolated power meters means the 4iiii Precision Dual accurately measures left and right power balance. It also provides a genuine total power output (not simply doubling power from one side).

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  • This power meter is compatible with ANT+ devices
    This power meter measures power from BOTH legs
    Most expensive option
    Moderate skills required - may require tools & assistance

    Rotor 2INPower System

    A beautiful piece of engineering. The Rotor 2INPower Dual sided power metering system has two independent strain gauges. One, in the right crank arm and the other in the bottom bracket axle (left leg power). Through this innovative design the Rotor 2INPower Dual provides accurate LEFT and RIGHT power balance as well as a true TOTAL power output figure.

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