Description
Quarq DFour DUB Power Meter
The Quarq DFour DUB Power Meter is designed for users of a Shimano crankset that want to step-up their game and start training with power! Featuring a 110 BCD, 4-bolt configuration, the DFour accepts all Shimano road chainrings. However, it is ideally suited for DURA-ACE 9100 rings specifically (for cosmetic purposes). This power meter benefits from over 10 years of Quarq’s experience in power meter technology. Therefore, it is accurate, durable and consistent in all conditions. It also has features such as MagicZero (automatically offsets) and 10K Temperature compensation (stays accurate regardless of temperature changes).
The DZero platform is now combined with SRAM’s new DUB technology. This means easy part choices, quality materials and a broader selection for bottom brackets and chainrings. The power meter runs for 200 hours on a single CR2032 battery and comes with a full 2-year warranty.
Key Product Details
Compatibility:
This power meter fits SRAM RED, SRAM Force and Quarq DZero 8-bolt crank arms. It fits both the DUB or GXP versions. It ships with Quarq DZero crank arms unless otherwise specified. Regarding chainrings, it is designed for Shimano DURA-ACE 9100 chainrings. Shimano Ultegra R8000, 105 R7000 and Carbon-Ti X-CarboRing EVO Shimano 9100 rings will also work, however they will not match the shape or color of the power meter as nicely. See Compatibility tab for more information.
Power Measurement:
The Quarq power meter measures power at the spider and is therefore able to measure power from both legs.
Key Features:
Dual-leg power measurement, accurate to +/- 1.5%, lightweight carbon crank arms, 200 hours of battery life, CR2032 user-replaceable battery, ANT+ and Bluetooth compatibility, auto-zero (automatic calibration). See Specs tab for more information.
Options For This Power Meter
Crank arms: You can purchase the power meter with or without crank arms. Available crank arms are:
- 165 mm | 167.5 mm | 170 mm | 172.5 mm | 175 mm
DZero DUB – These are the crank arms that are pictured above and will ship with the power meter unless otherwise specified (they require a SRAM DUB bottom bracket). Unless you need GXP or higher-end SRAM RED crank arms, these are the ones we recommend.
RED DUB E1 – If you are looking for the best SRAM has to offer, the SRAM RED E1 Crank Arms are it. The RED cranks are lighter (by about 171 grams) and stiffer than the DZero arms. If you would like to order the power meter with SRAM RED cranks, please select ‘No crank arms’ on this page and then add the SRAM RED E1 Crank Arms to your shopping cart.
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 chainrings. Works with Ultegra R8000 and 105 R7000 chainrings but will not aesthetically match
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