Connect a head unit or computer, and you can start riding with power. With up to 800 hours of battery life, an automatic terrain selector, +/-1% accuracy. How does it work?.
Shimano Dura Ace R9200 4iiii Dual Precision Pro Powermeter Crankset 172.5 50/34
4iiii Precision Dual Sided Power Meter Shimano Dura Ace FC-R9200 175mm crankset
Shimano Dura-Ace SW-R9160 Dura-Ace Di2 Bar end shift switches for TT-bars. Pair.
Shimano Dura-Ace RD-R9250 Dura-Ace Di2 12-speed rear derailleur E-tube
