Sram XX1 Eagle Boost Quarq Dzero Power Meter 104 BCD 12S spider
Every innovation in Quarq’s DZero platform represented the 10+ years of Quarq’s advances in power meter technology. This same platform is now combined with Sram’s innovative DUB technology to bring you the simplest spider-based power meter. Simplified part choices, quality materials and a broader compatibility for bottom brackets and chainrings, brings power on every ride.
Features
- MagicZero™: automatic calibration as you ride. No need to back pedal or manually calibrate through your headunit.
- Bluetooth low energy technology and ANT+ wireless data transfer.
- AxCad: no cadence magnet required.
- 10K Temperature Compensation.
- Battery: CR2032, 200-hour battery life, change without tools.
- Power Balance.
- OmniCal: swap chainrings without affecting accuracy.
- IPX7 waterproof rating.
- Accuracy: within 1.5%, measuring both legs.
- Free firmware upgrades with the SRAM AXS app.
- Real weight: 114 g.
Technology
MagicZero™
MagicZero works by continuously monitoring the torque signals from the strain gages as you ride. When the torque signals meet specific criteria for a period of time, a torque snapshot is recorded. Over time, these snapshots accumulate. When enough snapshots within a given tolerance are collected, then a new Zero-offset is computed and set in the power meter. MagicZero allows the Zero-offset to be automatically managed by the power meter without any specific user actions. Typically, the MagicZero measurements occur when the bike is stationary, coasting, or slowly backpedaling. But as noted above, the criteria is designed to reject snapshots incongruent with recent observations. The MagicZero algorithm is intended to be continuously operating and reaching stable convergence on the correct Zero-offset. If at any point a misleading Zero-offset is applied, the algorithm is designed to self-correct without user intervention.
Note: XX1 Boost power meter spider must be paired with a XX1 Eagle™ DUB 8-bolt crankset and a 104 BCD X-Sync 2™ chainring (not included).
Note: Not compatible with Sram XX1 Eagle direct mount standard 3-bolts crank arms.