FSA’s MTB PowerBox Carbon Crankset employs a P2M convertible spider design for multiple chainring options.

FSA's crank arms and BB392EVO spindle mated together produce a stiff, reliable, extremely versatile power meter crankset available with a double or single chainring configuration.

The FSA MTB Carbon PowerBox is an ultralight fundamental tool that will help athletes track their data directly during both training sessions and races: in fact, the many advantages provided during a race are much more important than a few grams difference.

A +/-2% accuracy precision is the key quality you want in a power meter. Nowadays, powermeter cranks represent a fundamental tool that will help riders track their data directly during training sessions and to be increasingly more competitive on race day.

Bluetooth connectivity and Left & Right leg output analysis are already included without additional cost.

Now available for download and purchase are the PowerBox Upgrades for the FSA PowerBox giving additional data during the ride and for analyzing your training sessions. Upgrades available are:


Bluetooth (included) - With this upgrade your FSA PowerBox can transmit data via Bluetooth Low Energy (BLE or Bluetooth Smart) to your bike computer.

Left/Right-Balance (included) - The L/R balance shows you the percentage each leg is contributing to your total power output. (power left = pressure on the left pedal + pull up on the right pedal; power right = pressure on the right pedal + pull up on the left pedal).

Pedal Smoothness upgrade - Pedal smoothness is an advanced metric for riders who want to optimize their pedaling. It shows you how evenly power is applied throughout the whole 360 degree pedal rotation. FSA PowerBox power meters collect the data for both legs combined. Please note that transmission of this data to your bike computer is only possible via ANT+.

Torque upgrade - Torque is an interesting value especially for sprinters and track riders who want to measure their peak power output. This value shows you the power independent from your cadence. Please note you must check if your bike computer can show the torque value before upgrading your FSA PowerBox.


Convertible spider design for different chainring and chainline configurations
Hollow carbon composite arms with UD finish
BB392EVO 30mm AL 7050 alloy spindle fits every MTB frame (purchase BB separately)
AL7075 100% CNC chainrings
Thick-Thin tooth design for maximum chain engagement
Optimised for 11 and 12 speed system


Type Powermeters
Technology BB392, Hollow Carbon, Megatooth, Modular, No
Discipline MTB
Series Powerbox
Colour Neutral
Compatibility BB392
Drivetrain Compatibility Shimano10/11S, Sram10/11S, Shimano10S, Sram10S
Material Carbon

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