● Crank arm carbon fiber, BCD:130.
Length: 170, 172.5, 175. gloss finish.
● Chainring: 42～65T CNC machined with integrated guard.
Color: Black or silver or gray anodized.
● Chainring bolt & nut: Alloy 7075.
● Compatible B.B: square or ISIS and option Octalink-splined.
