★ Crank Arm: 165/167.5/170/172.5/175/177.5mm, 7075AL. 

 

★ Chainring: 42/29T; 5 bolt 94mm BCD, 7075AL.

 

★ Chainring bolt: KCNC Allen bolts 7075AL.

 

★ Q-Factor: 164mm

 

★ Bearing: Full stainless steel, better anti-rusting&durability.

 

★ High precision full CNC machined chainrings for smooth shifting.