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K2-TYPEXC-BLADE Double
★ 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.