SRAM Quarq power meters have become the new gold standard for accuracy and reliability in power. The Dfour 110 4 Bolt unit is designed for use with Shimano chainrings and a SRAM Dub bottom bracket.
Features
Bluetooth low energy technology and ANT+ wireless data transfer
MagicZero - automatically checks and recalibrates your power meter as you ride – no need to manually calibrate
AxCad -- no cadence magnet required
10K Temperature CompensationBattery -- CR2032, 200-hour battery life, change without tools
OmniCal -- swap chainrings without affecting accuracy
