Use the SRAM XX1 Eagle Power Meter Spider to upgrade a legacy SRAM XX1 Power Meter to the DZero platform.

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. SRAM’s Eagle groupset and an XX1 Eagle Power Meter Spider are a winning combination for mountain bikers who want to soar.


Bluetooth low energy technology and ANT+ wireless data transfer.

AxCad - no magnet.

10K Temperature Compensation.

Battery - CR2032, 200-hour battery life, change without tools.

OmniCal - swap chainrings without affecting accuracy.

Power Balance.

IPX7 waterproof rating.

Accuracy - within 1.5%, measuring both legs.

Free firmware upgrades with the Qalvin app.

Two power meter variations - Conventional and Boost 148 (52mm chainline).

Requires an X-SYNC 2 or X-SYNC 104 BCD chainring.

Uses the 8-Bolt crank to spider interface.

SRAM XX1 Power Meter owners can upgrade to the DZero platform with an Eagle Power Meter Spider. (Note: Boost spiders should not be paired with 156Q crank arms).


Bolt Circle Diameter: 104 BCD

Compatibility: Designed for SRAM 1X mountain bike drivetrains. Requires an X-SYNC 2™ or X-SYNC™ 104 BCD chainring.

Accuracy: 1.5%

Battery: CR2032, 200 hours of riding time

Material: CNC Machined Aluminum Spider

Wireless Technology: ANT+, Bluetooth low energy technology

Weight: 95/97g (Conventional/Boost)

8-Bolt Compatibility

Power meters and cranksets on 8-bolt since release

Quarq ELSA RS (Aug ’14)

Quarq RIKEN AL (Apr ’15)

Quarq Prime Power Ready Cranksets (Mar ’16)

SRAM RED Power Ready Cranksets (Mar ’16)

SRAM XX1 Power Meter (Aug ’14) (Note: Boost spiders should not be paired with 156Q crank arms)

SRAM RED BB386EVO standard crankset (Mar ’16)

Power meters switched to 8-bolt

Quarq RIKEN R (Revision AEQ onward, except warranty/replacement – Jul ’15)

SRAM RED (eTap graphics – Jan ‘16)

Incompatible products

Quarq ELSA R

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