Crankk Arm Length:165/167.5/170/172.5/175mm , 7075AL
Double Chainring (1): 42/29T; 5 bolt 94mm BCD, 7075AL
Double Chainring (2): 42/29T,42/27T,40/27T,40/26T,38/26T, 36/22T, 4 bolt 104/64mm BCD.
Chainring Bolt: KCNC Allen Bolts 7075AL
Bottom Bracket (BB): 68/73 (BSA)
Chainline: 48.5mm
Q-Factor: 164mm
Bearing:Full stainless steel, better anti-rusting&durability.
*High precision full CNC machined chainrings for smooth shifting