Quarq's hardware, your watts.
Quarq's BB30 Elsa R Power Meter Crank Arms are exact replicas of SRAM's Exogram Hollow carbon cranks, so they're compatible with SRAM's 10 and 11-speed chainrings and BB30 bottom bracket interfaces. Their power meter communicates readings with an industry-leading accuracy of X/- 1.5% to your head unit via ANT+ wireless, so your current computer is likely already compatible with it. The Elsa R Power Meter also features Quarq's OmniCal power measurement technology, which makes the unit's measurement and accuracy independent of the chainrings so you can swap between bikes and setups without worrying about compatibility.
The crank arms' proprietary Power Balance technology adds function to flexibility by charting the power you're generating in both crank arms separately, so you can compare the two and identify weaknesses in both legs to target for improvement. And while Power Balance is nice, our favorite feature may be the ability to change the system battery yourself. Other systems require you to mail in your crankset for battery swap-outs, but the Elsa R model features a tool-free user replacement system.
One issue that has plagued power meters since their inception is wildly variable temperatures in geographies where rapidly rising or falling mercury necessitates one or more mid-race zeroings. Even if it's just coating for a few seconds or toggling through your head unit to the proper option, it can still be the difference between winning and losing. It's also obnoxious as hell.
The Elsa R Power Meter's sensors address this with the 10K dynamic temperature compensation feature, which is best described as an auto-adjust schedule that Quarq developed by mapping an estimated 10,000 data points to record how the unit responds to temperatures ranging from zero to 130 degrees Fahrenheit. Simply put, the power meter figures out the atmospheric details for you with minimal drift, so you can focus on turning the cranks, not babysitting them.
While we doubt it'll ever be needed to this extreme, we think it's only appropriate that Quarq designed the system to be waterproof for 30 minutes while submerged under one meter of water. The Elsa R is finished with a few classic computer features. It measures cadence with an AxCad accelerometer, and it's compatible with various training software such as Training Peaks WKO+, Training Peaks, Golden Cheetah, and Strava.
- Spider-fitted Quarq OmniCal power measurement
- +/- 1.5% power meter accuracy
- Power Balance captures left and right drive strokes
- AxCad accelerometer measures cadence
- 10K dynamic temperature compensation
- ANT + wireless compatible with Garmin Edge 500, 510, 800, 810, 1000 and Forerunner 910XT
- Compatible with TrainingPeaks WKO+, TrainingPeaks, Golden Cheetah, Strava apps
- Replaceable CR2032 battery lasts over 300-hours
- IPX-7 water-resistant rating (30-minutes submerged at 1-meter)
- Fits bikes with BB30 bottom brackets with SRAM 10/11-speed chainrings