Some Quarq variants are made to order and this takes 5-6 weeks please email to check stocks .
Designed especially for Shimano Dura-Ace R9100 series and compatible with shimano R8000 chain rings.
DFour 91 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 DFour 91 power meter is a bolt-on upgrade, pairing with the 11-speed Dura-Ace® R9100 or Ultegra® R8000 chainrings. Get the chassis, which includes Quarq’s lightweight, sturdy Exogram TM carbon crank arms. The GXP and BB30 versions work with every bottom bracket shell, including BBright and BB386EVO.
DFour91 is designed for Dura-Ace R9100 chainrings.
Must be paired with a compatible SRAM bottom bracket.
8-bolt power meter owners can upgrade using a power meter spider.
FEATURES AND BENEFITS
Bluetooth low energy technology and ANT+ wireless data transfer
AxCad -- no cadence magnet required
10K Temperature Compensation
Battery -- CR2032, 200-hour battery life, change without tools
OmniCal -- swap chainrings without affecting accuracy
IPX7 waterproof rating
Accuracy -- within 1.5%, measuring both legs.
Crank arm length: 162.5mm, 165mm, 170mm, 172.5mm, 175mm, 177.5mm,
Bolt Circle Diameter (BCD): 110 BCD
BB Spindle Interface: 24mm, 30mm,