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Item # FSA002O

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  • Black, 170mm 53/39t ($745.99)
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  • Black, 170mm 50/34t ($745.99)
  • Black, 172.5mm 50/34t ($745.99)
  • Black, 175mm 50/34t ($745.99)
  • Black, 170mm 52/36t ($745.99)
  • Black, 172.5mm 52/36t ($745.99)
  • Black, 175mm 52/36t ($745.99)
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Item # FSA002O

Low bar, high potential.

Getting into the power game can be a daunting prospect, but FSA—in partnership with Power2Max—lowers the bar for entry with the PowerBox Power Meter Crankset. The PowerBox is undeniably one of the most affordable models in the power meter industry, but suggesting that it's an entry level option isn't quite accurate. A downloadable system update (available from September 2017) changes it from a single-leg meter to a dual-leg meter. It's built to grow with you, not to be outclassed once a category upgrade means a single leg meter is no longer accurate enough to give you the detailed info you need on race day.

Out of the box, the meter measures power in a single leg and calculates total output to an industry-standard +/-2%. It wirelessly transmits those numbers to ANT+ head units, and Bluetooth compatibility is also available with a system update. FSA's BB386EVO design also provides virtually limitless compatibility, as you're never more than a simple adapter away from fitting the 30mm spindle to whatever standard your frame's bottom bracket shell adheres to.

  • A power meter crankset for the aspiring racer
  • Proven accuracy with Power2Max internals
  • Compensates for temperature variations to prevent drift
  • Aluminum construction doesn’t fear the occasional crash
  • Measures power on both legs with optional update
  • Wireless transmission to most head units
  • Easily replaceable battery is protected from the elements
  • Bottom bracket design adapts to virtually any standard

Tech Specs

Arm Material:
6061 T6 aluminum
Arm Length:
170mm, 172.5mm, 175mm
Chainring Sizes:
50/34t, 52/36t, 53/39t
Bolt Circle Diameter:
110mm, 130mm
Bolts:
4
Rings:
2
BB Type:
BB386EVO
Spindle:
30mm
Compatible Components:
Shimano/SRAM 10 and 11-speed
Claimed Weight:
890g
Recommended Use:
cycling
Manufacturer Warranty:
2 years

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Avg. ride time: 4h 35m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

German Reliability

    FSA quietly released their foray in to the power meter market in the middle of 2017, and although it may seem like a gamble to purchase a first generation power meter, they're actually backed by years of German reliability and technology.

    FSA are smart folks and decided not to go out on this venture by themselves, so they employed the folks over at Power2Max to whip something up for them. They've been around since 2010, which doesn't sound like a long while, but is an eon in power meters. Since that time, they've gone through three generations, and even the first was trouble free, a rarity in this genre.

    So this unit will give you everything you'd ever really want, accuracy, reliability, and price. The only small issues are the proprietary FSA chainrings and the weight. This is definitely one of the heavier cranks on the market and the chainrings aren't compatible with anything else. That really isn't too large of an issue though, a well maintained drivetrain will see upwards of 10,000 miles on a chainring set and replacements are easily found.

    Some cool features:
    - Automatic temperature compensation (which also works mid ride)
    - It auto zeros whenever you stop pedalling for a few seconds, only PM on the market that does that
    - Compatibility with every single frame out there that isn't a Trek
    - Attainable price (I guess thats not really a feature, but I had to include it)

    Feel free to reach out with any questions you may have!