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Whether it’s tackling climbs on gravel, or hitting steep gradients on the road, there are times when using even a compact chainset can leave you wishing you had another gear or two.


The crank spider has been reworked with a 90mm bolt-circle diameter, so the smaller rings can be direct-mounted, similar to one-by systems. This saves weight and improves the stiffness of the chainset.


It is very versatile and allows also the rider to stay in the middle of their cassette for longer, improving chainline and thus efficiency.
Unleash your power with brandnew FSA PowerBox Road

New catchy black graphic, new chainring combination and also available in SuperCompact version. Are you ready to unleash your power with the new FSA Powerbox?


 FSA’s ROAD PowerBox Carbon SuperCompact Crankset employs a P2M convertible spider design for multiple chainring options. FSA's hollow carbon arms and BB386EVO spindle mated together produce a very lightweight, extremely versatile power meter crankset available with a double chaining 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.


  • Hollow carbon arms with UD carbon finish
  • Forged and then CNC machined AL6061 spider
  • 30mm forged AL7050 BB386EVO spindle (purchase BB separately)
  • AL7075 100% CNC stealth BLACK chainrings
  • BCD: 120/90mm
  • Supercompact chainrings: 48/32T and 46/30T
  • Optimized for 11-Speed systems
  • Including - R/L Balance and Bluetooth
  • Spider-based power sensors provide total power output measurement of both legs, with Left & Right leg output analysis
  • System upgrades*: Pedal Smoothness.

*System upgrades available >here<


Code Type
328-0009BJ3030 CK ROAD PBOX Carbon 120/90 46x30T 170mm
328-0009BJ4030 CK ROAD PBOX Carbon 120/90 46x30T 172.5mm
328-0009BJ5030 CK ROAD PBOX Carbon 120/90 46x30T 175mm
328-0009AJ2030 CK ROAD PBOX Carbon 120/90 48x32T 165mm
328-0009AJ3030 CK ROAD PBOX Carbon 120/90 48x32T 170mm
328-0009AJ4030 CK ROAD PBOX Carbon 120/90 48x32T 172.5mm
328-0009AJ5030 CK ROAD PBOX Carbon 120/90 48x32T 175mm


Type Powermeters
Technology BB386EVO, Hollow Carbon
Discipline ROAD, GRAVEL
Color Neutral
Weight (gr) 776.5
Compatibility BB386
Bolt Circle Diameter (BCD) 120
Crankset Type Double
Drivetrain Compatibility Shimano 10/11S, Sram 10/11S, FSA 11S
Holes Number 4
Material Carbon