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FSA Road PowerBox Carbon Crankset Power Meter

Josh Matthew December 15, 2020


Lightweight, accurate, extremely versatile and at a fraction of the price of other, crank-based power meters

Clear selection

FSA Road PowerBox Carbon Crankset Power Meter

The FSA Road PowerBox Carbon Crankset Power Meter is a crank-based power meter, with single-leg power being measured at the spider. Specifically, it uses Power2Max’s proven spider design. The FSA PowerBox Carbon uses FSA’s 7075 aluminum 110 mm BCD chainrings, FSA hollow carbon arms and a BB386EVO 30 mm spindle. The power meter uses a CR2450 battery (which is very easy to replace), gets approximately 400 hours of battery life and is accurate to within 2% (industry standard). The result is an accurate, extremely versatile power meter that comes with top-notch FSA chainrings and crank arms, and costs of fraction of the price of other, crank-based power meters.



  • Chainring sizes: 50/34 | 52/36 | 53/39
  • Crank arm lengths: 165 mm | 170 mm | 172.5 mm | 175 mm | 177.5 mm | 180 mm


Upgrade Options

  • Left/Right Power Balance: The Left/Right Power Balance upgrade allows you to see your estimated left/right power balance. That is, how much power each leg is generating. Please note, this requires a bicycle computer that is capable of displaying left/right data (most new computers are). The cost of this upgrade is $50
  • Bluetooth SMART: The PowerBox comes with ANT+ capability. At any time, you can upgrade it to a dual ANT+|Bluetooth SMART unit. The cost of this upgrade is also $50



The FSA Road PowerBox Carbon Crankset Power Meter uses a BB386EVO 30 mm axle. This makes the power meter compatible with virtually every frame set when used with the correct bottom bracket and spacers.

The chainrings are compatible with Shimano 10- and 11-speed groupsets, SRAM 10- and 11-speed groupsets and Campagnolo 10-speed groupsets. This allows you to use a wide variety of chanrings.


In the Box

  • FSA Power Meter
  • 2450 coin cell battery
  • Quick Start guide


FSA Road PowerBox Carbon Crankset Specs

NameFSA Road PowerBox Carbon
Bike TypeRoad
Location of Power MeasurementSpider
Left or Both Legs MeasuredBoth
Independent Left/Right MeasurementYes (estimated) - with system upgrade
InstallationMore involved (60 min. estimated)
Communication ProtocolANT+. Bluetooth SMART with system upgrade
Claimed Accuracy+/- 2.0%
Weight733 grams
Battery Type2450 coin cell
Battery Life400 hours
Method of Cadence MeasurementAccelerometer
Warranty2 years

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