New Quarq DFour91 power meter: more accurate and specific to Shimano Dura-Ace R9100

Quarq has released the Quarq DFour91 power meter, as well as a new Quarq DZero power meter, extending its support for Specialized S-Works carbon cranksets

SRAM's sister company Quarq has released two new power meters and extended its support for Specialized's S-Works carbon crankset, updating the Quarq DZero power meter.

An update of the Quarq DFour, the Quarq DFour91 is brand new and designed especially for Shimano's Dura-Ace 9100 series.

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