C2 cranks are the key component in DUO’s high-performance race drivetrain. Hollow forged 6066 aluminum crank arms deliver superior stiffness while being extremely lightweight. C2 cranks center around a 24mm chromoly hollow spindle and include a precision sealed bearing Euro external outboard bottom bracket. 7075 CNC machined 44-tooth x 3/32” chainring is included. C2 cranks provide pro-level performance straight out of the gate.