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

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

Material spider: aluminum

Material crankshaft: steel

Crankshaft diameter: 24 mm

Crank lengths: 170mm

bolt circle diameter diameter: 110 mm

Spider: 4-arm, asymmetrical

Chainring gradation: 50-34

Chainring Bolts: Aluminum

chain line : 44.5 mm

Q factor: 148 mm

Compatibility bottom bracket: BSA, ITA, BB30, BB92 etc. (optional, not included)

Compatibility chains: Shimano CN-M9100 12-speed , CN-M8100 12-speed

Finish: matte

Color gray