Designed especially for Shimano®’s Dura-Ace® R9100 series, the Quarq DFour91 Power Meter brings Quarq’s next-generation DZero platform to Shimano®’s latest groupset.
DFour91 embodies 10 years of Quarq advances in power meter technology, plus new features such as dual Bluetooth Low Energy and ANT+ wireless data transfer, revised circuitry, a new strain gauge design and the Qalvin BLE app.
The DFour91 power meter is a bolt-on upgrade, pairing with the 11-speed Dura-Ace® R9100 chainrings. Get the chassis, which includes Quarq’s lightweight, sturdy ExogramTMcarbon crank arms. The GXP and BB30 versions work with every bottom bracket shell, including BBright and BB386EVO. If you already have a power meter using the 8-bolt interface, upgrade with the DFour91 spider.
Features & Benefits
My second Quarq power meter, the DFour91 is one of the best and accurate power meters you can buy today. Do a Google search for Quarq power meter reviews and you'll see several articles praising the power meter's capabilities.