The specialists for power measurement systems from QUARQ have made their DZero and DFour power meters fit for the universal SRAM DUB crank standard. Their lightweight aluminum crankshafts with a diameter of 28.99 millimeters are compatible with the corresponding DUB bottom bracket for all common road bike bottom bracket standards. The latest generation of Quarq power meters can therefore be easily swapped between several bikes.
But not only the crank system has changed, the Quarq Spider has also been equipped with new features. The latest generation is compatible with the SRAM AXS app, which allows firmware updates and other settings to be made. The new MagicZero function ensures optimum calibration of the power meter at all times and eliminates the need for manual calibration. OmniCal and 10K Active Temperature Compensation ensure consistent measured values at all times, even when changing chainrings and temperatures.
The design of the Quarq DFour DUB Powermeter Spider is adapted to Shimano Dura Ace 9100 chainrings. The DFour Powermeter therefore fits perfectly into road bikes with the Dura Ace 9100 groupset.

NOTE: The spider is only suitable for SRAM and Quarq cranks with 8-bolt direct mount!

Features
MagicZero - automatic check and recalibration of the power meter
AXS app - for firmware updates and settings
10K Active Temperature Compensation - automatic temperature compensation with 10000 programmed data adjustment points
Wireless data transmission via Bluetooth Low Energy or ANT+
OmniCal - chainring changes do not require recalibration and have no effect on the measurement accuracy
Cadence measurement via acceleration sensors (no additional magnet required!)
Waterproof construction according to IPX7 standard
LED power indicator always informs about battery level
200 hours operating time (tool-free battery change according to CR2032 standard)
Power Balance - calculates the power distribution between left and right leg
+/- 1.5% measuring accuracy

Specifications
Spider material: Aluminum
Bolt circle: 110 mm asymmetrical | 4-hole
Compatibility cranks: SRAM and Quarq cranks with 8-bolt direct-mount mount
Compatibility chainrings: Shimano 11-speed Dura Ace 9100, Ultegra R8000, 105 R7000, Rotor 4-arm
Technology: SRAM AXS, Quarq Power Meter
Data transmission: ANT+ and Bluetooth
Battery life: up to 200 hours
Chainrings: without
Color: black