Crank

Cranks can come in 1, 2 or 3 piece. The pieces of a crank are the left and right crank arm and the spindle. A 1 piece the crank arms and spindle are all one. Crank arm lengths can vary. The crank arm may be drilled and threaded for either a 1/2″ or 9/16″ pedal. Typically cruisers have a 1 piece crank that accepts a 1/2″ pedal. The crank arm is held in place in the bottom bracket with a nut that is reverse threads.