Power every ride with the SRAM Quarq DFour DUB Power Meter Spider and Crank Arms, purpose-designed for Dura-Ace R9100 chainrings. Reach new goals and explore new roads with a power meter that delivers on accuracy, durability and reliability - train using a Quarq power meter without changing your drivetrain. Enjoy up to 200 hours of ride time in any weather condition thanks to its IPX7 waterproof rating and 10K temperature compensation, so if harsh climates don't hold you back, neither should your power meter.

DFour DUB brings simplicity and ease of use to your training. With MagicZero automatic calibration, there's no need to worry about calibrating before you ride - just jump on your bike and go. It also features Bluetooth Low Energy and ANT+ wireless data transfer, sending power output data directly to your cycling computer.

Specifications
BB Compatibility: All SRAM Road DUB BBs
Chainring Size: No rings included
BB Spindle Interface: DUB
Crank arm material: Carbon
Colour (Crank arm): Natural carbon