Crank arm : alloy forged, BCD: 130 or 144mm
Length: 165, 170, 175mm
Chainring: 42～53T Steel
Teeth size : 1/2"x1/8" or 1/2"x3/32"
Color: Sand blast black or silver anodized
Chainring bolt & nut: CR-MO steel
Compatible B.B: square
Finish: Black or silver anodized