NOS SR/Sakae "Apex" 52/40 Crank Arm, Drive side only--118 BCD. Beautiful vintage double crank, drive side only, in New condition. 170mm arm length. Has 52/40 chainrings, and comes with a spare NOS 40T inner chainring. This one also has a chain guard--which can be removed--to prevent the chain from coming off the larger chainring. This is date stamped "81" and should accommodate regular 9/16 X 20 pedal threads. Please see photos for condition. I am an enthusiast, not a retailer, so all sales are final.