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The SRAM XX1 Eagle Power Meter unites Quarq's DZero power meter platform with CARBON TUNED crank arms for robust, intuitive power measurement in the lightest ever chassis. The DZero platform embodies 10 years of Quarq's technology advances and adds new features such as dual Bluetooth low energy and ANT+ wireless data transfer, and the Qalvin BLE app. The companion X-SYNC 2 chainrings are designed specifically for Eagle chains and drivetrains.

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Model ID


  • Two power meter variations - Conventional and BOOST™ 148 (52mm chainline).
  • Requires an X-SYNC 2 or X-SYNC 104 BCD chainring.
  • Existing XX1 power meter owners can upgrade using an Eagle Power Meter Spider (Conventional, not BOOST™).
  • Free firmware upgrades with the Qalvin app.
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Speeds 11/12
Crank arm length 170mm, 175mm
BB Compatibility DUB BSA73,DUB PF89.5,DUB PF92,DUB PF30 MTB73,DUB BB30 MTB73
Chainring Size n/a
Bolt Circle Diameter (BCD) 104 BCD
Chainline 49.0mm, 52.0mm
BB Spindle Interface DUB
Color (Crank arm) Natural carbon