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Application: Cross Country, Trail
Type: crankset with power measurement (dual-sided)
Chainring Mount: 104 mm bolt circle diameter, 4-arm
Series: DZero (Eagle)
Crankarm Material: carbon composite
Axle Material: aluminium
Crankarm Length: 170.0 mm, 175.0 mm
Chainline: 49 mm
Q-Factor: 168 mm
Axle Diameter: 28.99 mm (DUB)
Recommended Bottom Bracket: SRAM DUB
Recommended Chain: SRAM Eagle
Tolerance: +/- 1.5 %
Point of Measurement: spider
Power Source: CR2032
Battery Life: approx. 200 hours
Data Collected: power (dual-sided), cadence, torque, pedal stroke uniformity
Data Transfer: ANT+, Bluetooth® Smart (4.0/LE)
- carbon composite crankarms (chassis) with CNC machined aluminium spider (power meter)
- requires an X-Sync™ or X-Sync™ 2 104 mm BCD chainring
- change battery without tool
- auto or manual zeroing
- LED status indicator
- power meter shuts off after 10 minutes of inactivity, automatically turns on again when the crankarms are rotated
- no cadence magnet required thanks to AxCad (multi-axis accelerometer)
- 10K temperature compensation (programmed with over 10,000 data points)
- swap chainrings without affecting accuracy
- Qalvin BLE App: installation, firmware updates, zeroing, battery voltage check, system diagnostics
- not compatible with Cannondale Asymmetric Integration (Ai)
Operating Mode QUARQ
The crankset is the heart of your bicycle. Its sole job is to convert the effort from both legs to forward motion. It is the perfect place to measure power.
Power meters calculate power by measuring the torque (pedal force) and the angular velocity (cadence). Power = torque x cadence.
When you press on the pedals, all parts of the bikes drivetrain displace (flex) slightly under the load. Power meters are designed using finite element analysis to displace in a very controlled manner in specific locations in response to applied load. Strain gauges are used to measure the displacement and thus calculate the applied torque. Reed switches are used to calculate cadence.
Quarq’s next-generation power meter platform, DZero, is named for the DZero Experiment, one of science’s most accurate and innovative projects to detect subatomic particles moving at the speed of light. With a new measurement circuit, a revised strain gauge design, improved accuracy throughout the pedal stroke and software advances built into the Qalvin App, DZero represents the state of the art in power meter technology. Dual Bluetooth low energy technology and ANT+ let you choose how to capture the data. A simplified product line makes it easier to choose and install the right power meter for your bike. Increased compatibility, including Boost 148 (52 mm chainline) mountain bikes and BB386EVO bottom brackets.
Power measurement is independent from chainring selection. Switch from road to TT chainrings without impacting accuracy. No recalibration necessary.
Displays the ratio of power generated in the right drive stroke (first half) versus the left drive stroke (second half). Lets you work on an equal pedal stroke over 360 degrees of rotation.
Forward thinking and backwards compatible DUB™ BB/Crank technology is the workhorse without restraint. Designed for the most discerning pros. And riders who set it and neglect it. DUB™ is compatible with all major bottom bracket standards. Offering better sealing than ever before, without having to make compromises to fit all frames. Yet it opens the door for a new crank spindle. It’s a new approach that embraces the old. The relationship between bottom bracket spindle and bearing is the core of DUB™ technology. It’s where stiffness meets durability.
170.0 mm: 00.3018.203,170
175.0 mm: 00.3018.203,175
- 1 pair of QUARQ XX1 Eagle cranks, power meter spider included
- battery included
- chainring bolts included
- chainrings not included
- bottom bracket not included