Shimano Fc-m985 Xtr 180 42/30t 10-speed Crankset With BB

The XTR Race M985 double-ring crank complements race-day performance with a narrow Q-factor, unparalleled power transfer and CloseStep chainring options to suit racers speed and style. Includes bottom bracket.
??2 tooth outer ring, 30 tooth inner ring
?¢CloseStep gear ratios result in quicker shifting response and fewer recovery shifts so that you don't lose momentum
??04mm/64mm BCD
?¢Compatible with 10 speed chains
?¢Shimano Reference Number: FC-M985