Shimano Ultegra FC-R8100-P

Offering all the precision and functionality of the Dura-Ace power meter, the Ultegra FC-R8100-P power meter comes in a more affordable package.
Integrated, waterproof, and rechargeable Li-ion battery
Up to 300+ hours of ride time. * Depending on ANT+/Bluetooth® LE settings
Accurate data collection. Software automatically compensates for temperature changes
± 1.5% strain gage accuracy throughout the entire calibration range. * Depending on ANT+/Bluetooth® LE settings
Simple zero offset calibration with switch on transmitter
New pedaling vector function helps you improve your pedal stroke and find increased biomechanical efficiency
With the new web service SHIMANO CONNECT Lab, your pedal stroke can be analyzed and visualized in more detail than ever before
HOLLOWTECH II Technology
Chainrings not included
BB set not included