RaceFace Atlas Downhill Crankset 170mm Direct Mount RaceFace CINCH Spindle Interface For 83mm BSA PF30 BB30 BB107 Frames BLK MFPN=P 109 BKPUR Cage Release releases cage spring Cage Release releases cage spring tension and offers easy wheel removal for maintenance Color Black Ring Position Type Inner Tooth Count 36 Drivetrain Speeds 11 Chainring BCD 110 Shimano Asymmetric Material Aluminum Defined Color Black keyword search CR8173 keyword search Y1P436000 Compatible with all CINCH direct mount rings and spiders to easily convert between existing chainring standards including: direct mount 1x 2x with and without bash and 3x configurations margin right:5%