ULTEGRA WATT POWER METER FC-R8100-P -12SPEED 172.5 / 50-34

SHIMANO Ultegra crank 2-fold FC-R8100-P | Power meters

The Dura-Ace FC-R8100-P crank not only converts your pedal power into propulsion, its high rigidity also ensures extremely fast and precise shifting behavior. The high shifting precision is supported by the optimized chainring design. In order to keep the weight down, the Japanese continue to rely on the proven Hollowtech II construction of the crank arms. A wide range of crank arm lengths and chainring options ensure the availability of the right crank for every type of rider and every terrain.

The new integrated power meter processes the data with outstanding accuracy. With a sensor on the left and right crank arm, in addition to performance evaluation, you can also detect muscular imbalances between the legs. The waterproof construction provides reliable and precise data in all conditions. The software's active temperature compensation also ensures this. A manual zero point calibration can be carried out in no time using a switch on the transmitter. Strain gauges developed by Shimano are used to ensure the greatest possible accuracy. The internal lithium-ion battery supplies the power meter with power for up to 300 hours of operation and is charged via an integrated port without having to be removed.


Technical data:

intended use : racing bike
Power measurement: on both sides (1x sensor on the left crank arm and 1x sensor on the right crank arm)
Power range: 0 to 2500 watts
Accuracy: <1.5%
Transmission protocol: ANT+ | Bluetooth
Battery: Lithium-ion battery (rechargeable with EW-EC300 charging cable)
Battery life: up to 300 hours
Waterproof: yes
Material crank arms: aluminum
Spider material: aluminum
Crankshaft material: steel
Diameter crankshaft: 24 mm
Crank lengths: 170; 172.5 or 175
bolt circle diameter diameter: 110 mm
Spider: 4-arm, asymmetrical
Chainring gradation: 50-34 or 52-36 teeth
Chainring screws: aluminum
chain line : 44.5 mm
Q-Factor: 148mm
Compatibility bottom bracket: BSA, ITA, BB30, BB92 etc. (optional, not included)
Compatibility chains: Shimano CN-M9100 12-speed , CN-M8100 12-speed
Driver weight: n/a
Finish: matte
Color gray

Weight according to manufacturer: 758g (50-34 teeth), 769g (52-36 teeth)
Weight weighed: 776g (50-34 teeth, 172.5 mm length)


Scope of delivery:

1x Ultegra FC-R8100-P crankset including power meter and chainrings without bottom bracket
1x charging cable
1x SHIMANO crank tool TL-FC40 for FC-R9100P