Quarq DFOUR91 Power Meter

The Quarq DFOUR91 power meter is a power meter that is interchangeable with Shimano Dura Ace R9100 chainrings. The Quarq DFOUR91 is an excellent addition to your Shimano groupset. The Quarq DFOUR91 power meter is also suitable for Shimano Ultegra R8000 chainrings. This power meter is equipped with a 24mm GXP bottom bracket fit. A bottom bracket with a GXP fit is required for this.

Quarq's power meters come from Sram and are equipped with ANT+ and Bluetooth. These Quarq power meters are one of the most accurate power meters on the market. With a maximum deviation of 1.5%, you have a very accurate power meter that measures both legs. The measuring system is built into the spider of the crankset. This gives you good protection and a battery with a somewhat longer life than, for example, Stages.