Pedal Axle Adaptor 1/2 TO 9/16 - Ruff Cycles
These pedal axle adaptors have a 1/2" thread to fit in you crank with a standard 9/16" screw. This way you can install any 9/16" pedal to any 1/2" crank. No matter how old or what type.
Thread = 1/2
Screw = 9/16