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
Weight (170 mm, manufacturer’s specs):
approx. 700 grams (50-34 teeth)
approx. 711 grams (52-36 teeth)