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 Attributes BCD 110 BB Inclusion No Chainline 43.5mm Teeth No Chainring Connectivity ANT+, BT LE Crank Spindle Diameter 24mm Interface Hollowtech II Pedals Thread 9/16'' Primary Color Black Speed 12