Crank Arm length: 165/167.5/170/172.5/175/177.5mm, 7075AL.
Double chainring (1): 42/29T; 5 bolt 94mm BCD, 7075AL.
Double chainring (2): 45/30T,42/29T,42/27T,40/27T,40/26T,38/26T, 36/22T, 4 bolt 104/64mm BCD.
Chainring bolt: KCNC Allen bolts 7075AL.
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.
