Bicycle pedals with a 9/16" thread are the standard for the cranks of adult mountain, city and road bicycles. The 1/2" thread is found on children's bicycles and one-piece cranks: these pedals will not fit them.
- Replace them if the axles have play and crunch, the platform is broken or the thread is stripped.
- The left pedal has a left-hand thread; the axles are usually marked L and R.
Lubricate the thread before installation.
