Power every ride with the Quarq DFour DUB. Designed for Dura-Ace R9100 and 9200 chainrings, DFour DUB delivers on reliability & accuracy.

Reach new goals and explore new roads with a power meter that delivers on accuracy, durability, and reliability. The DFour DUB was designed specifically for Dura-Ace R9100 chainrings. Train using a Quarq power meter without changing your drivetrain. You are working hard, pushing yourself to new heights in some of the toughest conditions. Ride with confidence knowing that your power meter will not quit when you need it the most. Enjoy up to 200 hours of ride time in any weather condition with its IPX7 waterproof rating and 10k temperature compensation; if harsh climates do not hold you back, then you need a product capable of rising to the occasion. That is exactly what the DFour DUB power meter is made for. Train harder, ride faster and unlock your ultimate potential. The DFour DUB power meter brings simplicity and ease-of-use to your training. With MagicZero automatic calibration, there is no need to worry about calibrating before you ride; just jump on your bike and go. DFour DUB features Bluetooth low energy and ANT wireless data transfer, delivering power output information directly to your cycling computer.

Compatible Crankset - Must use Quarq DZero DUB crankset and SRAM DUB bottom bracket
Battery: CR2032, 200 hours ride time
Durability - IPX7 waterproof rating
OmniCal: swap chainrings without affecting accuracy
MagicZero - automatic calibration during the ride
Accurate - within /- 1.5% measuring both legs
Wireless - BLE and ANT
10K TempComp - compensates for temperature changes during a ride
Firmware - use SRAM AXS mobile app
Compatible Chainrings - Compatible with Dura-Ace R9100/R9200 chainrings. Works with Ultegra R8000/R8100 and 105 R7000/R7100 chainrings but will not aesthetically match