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Stages Launches StageONE Power Meter

Affordability and versatility are hallmarks of new power option
ByJoe Lindsey
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Stages introduced an innovative new power meter at Interbike that, if it can deliver the goods, promises to shake up power measurement in cycling considerably.

The StageONE sensor is deceptively small and incredibly versatile. Weighing just 20 grams, it sits on the inside of the nondrive crankarm and transmits entirely via wireless. But it relies on traditional strain-gauge measured force, so it’s not merely a mathematical simulation based on other data.

And it’s more affordable than almost any other power meter on the market, with options starting at $699. Stages doesn’t offer a head unit, but StageONE runs on ANT+ transmission, so the system will pair with any ANT+ computer, such as Garmin’s GPS units. The StageONE also communicates on Bluetooth Smart for any firmware updates. It runs on a standard, user-replaceable watch battery.

Stages installs the StageONE power meter on the nondrive crankarm of many aluminum cranksets. It’s intended for almost any discipline: road, cyclocross, and mountain biking, even downhill.

There are a few quirks, but they’re minor. Because it measures left-side torque only, Stages measures total power by effectively doubling the output. But Stages says its data shows that the algorithm and direct power measurement keep its accuracy well in the range of competitors such as SRM and Quarq.

Stages doesn’t alter the crankarms to attach the power meter; it uses a 3M industrial adhesive instead. But it won’t retrofit the system to existing crankarms. You must purchase at least a new left-side arm (full cranksets are available).

Because carbon fiber has different deflection properties than metal, Stages can’t mount power meters on carbon-fiber crankarms.

And its location means that—for mountain bikers especially—it’s possible to damage the unit. Stages says, however, that the polycarbonate housing is fully sealed, and that the adhesive is strong enough that you’ll destroy the housing or crank before the adhesive itself fails. But it is conceivable that you could damage the unit, so Stages has a one-year warranty on manufacturer defects and will offer two-year extended protection programs as an option.

Stages offers road and mountain crankarms (or full cranksets) from Shimano, SRAM, and Cannondale, and is in the process of adding more partners. They’re OE customers, so the prices don’t reflect a premium other than the value the power sensor adds. Prices range from $699 for SRAM Rival or Shimano 105 to $949 for a Shimano Dura-Ace 9000 arm. Complete cranksets cost more.

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Nice to see great write up on your site yet again
how about the ibike its a pretty good power meter for triathlon
Someone should be able sto come up with a strain gauge and some bluetooth circuitry for a lot less cash.
I was pretty excited about this until I read, "$949 for a Shimano Dura-Ace 9000 arm" The crank option is great. Nice to be independent from the wheelset! Pretty trick, besides the price. Hopefully something will come around that I can sync to my Garmin 500 and there is someway to use my existing Dura-Ace 9000 arm.
Again, another expensive power meter! You can not tell me that in this day and age that nobody can come up with a power meter that costs the same as a good heart rate monitor. (Thinking Polar) The first company that does will become wealthy and there will be a huge leap forward in training for everyone not just the wealthy or professional!
this is very nice i like Thanks for sharing this with all of us. Of course, what a great site and informative posts insuranceallinone dot com Insurance All In One
If only there was the same market forces going for bicycle power meters as there is for the personal computer market, then that thing would be selling for $69.99 at Wal-Mart.