FSA Powerbox MTB Carbon


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Click here to buy from FSA USA’s webstore




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.


Kross Racing Team
Maloja Pushbikers XC Team
Team Trek Pirelli


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.

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+.

How? Go to the Support page on our website, log in and buy the upgrades you need following the instructions.


  • 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
  • Optimized for 11 and 12 speed system

System upgrades available >here<


Code Type
328-0003433030 CK MTB PBOX Carbon 96/68 1x32T 170mm V17
328-0003435030 CK MTB PBOX Carbon 96/68 1x32T 175mm V17
328-0003473030 CK MTB PBOX Carbon 96/68 1x34T 170mm V17
328-0003475030 CK MTB PBOX Carbon 96/68 1x34T 175mm V17
328-0003013030 CK MTB PBOX Carbon 96/68 1x36T 170mm V17
328-0003015030 CK MTB PBOX Carbon 96/68 1x36T 175mm V17
328-0004943030 CK MTB PBOX Carbon 96/68 36x24T 170mm V17
328-0004945030 CK MTB PBOX Carbon 96/68 36x24T 175mm V17
328-0003423030 FSA CK MTB carbon POWERBOX 1X30T 170mm
328-0003425030 FSA CK MTB carbon POWERBOX 1X30T 175mm


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