Priekšējā zobrata bloks Shimano ULTEGRA FC-R8100 175MM 2x12-speed-52x36T IFCR8100EX26
Optimal balance of stiffness, strength, weight and rotational performance
HOLLOWGLIDE structure cuts weight yet maintains strength for better power transfer and quicker, more precise front shifting
For 2x12-speed drivetrains
Weight: 711 g (52-36T) / 700 g (50-34T)
Chainring combination (OPTIONAL): 50-34T OR 52-36T
Crank arm length: 175 mm
Compatible bottom bracket type: Outboard (Hollotech II)
Crank fixing screw included
Spider/Gear arms: 4
HOLLOWGLIDE
HOLLOWTECH II
HOLLOWTECH crank arm
Recommended bottom bracket (not included): Press-fit SM-BB72-41B or Threaded (normal) SM-BBR60
Threaded bottom bracket shell width: 68/70 mm
Q-factor: 148 mm
Chain line: 44.5 mm
B.C.D.: 110 mm
Material: crank arms, inner chainring: aluminium (anodized) / outer chainring: aluminium (anodized), carbon fiber reinforced polymer (CFRP) / axle: steel (plated)
Compatibility:
Front derailleur: FD-R9250, FD-R8150
Bottom bracket: SM-BBR60 (thread type), SM-BB72-41B (Press Fit)
Chain: CN-M9100, CN-M8100, CN-M7100, CN-M6100