What is standard pedal thread size?

What is standard pedal thread size?

Bicycle pedals are commonly a 9/16″ x 20 threads per inch. The inside diameter of the internal thread (the “nut”) must be smaller. Measured in millimeters, the OD of the pedal is typically 14.2mm. For cranks the internal thread is nominally 13mm.

How do I know what size my pedals are?

Manufacturers have made it nice and easy for this one, and all you have to do is check the cranks on the bike. If your cranks are made up of three separate sections, two separate crank arms and the spindle that goes through the frame then your pedals will be size 9/16” x 20 tpi.

What is a spindle on a bike pedal?

A pedal usually consists of a spindle that threads into the end of the crank, and a body on which the foot rest is attached, that is free to rotate on bearings with respect to the spindle. Pedals were initially attached to cranks connecting directly to the driven (usually front) wheel.

How do you change a pedal spindle?


  1. Place pedal in a vise using axle/spindle jaw inserts.
  2. Remove pedal body end cap using a 5mm hex wrench.
  3. Remove spindle lock nut using a thin-wall 9mm socket.
  4. Remove pedal body from old spindle.
  5. Remove old pedal spindle from axle vice.
  6. Replace pedal body onto new spindle.

Where is the spindle on a bike?

The bottom bracket shell of a bicycle is the part of the frame where the spindle of the cranks go through. The bottom bracket and spindle together form the foundation of the drivetrain on your road bike or mountain bike.

How do you remove pedal spindles?

Place your pedal wrench on the spindle flats or hex wrench into the port on the inside of the crank arm. Push hard to loosen the spindle: Clockwise for the left-side pedal, counter-clockwise for the right. Continue rotating the spindle until the pedal is free and repeat on the opposite side.

Should leg be straight on bike?

When you’re riding a bike, your legs should become completely straight when the pedal is at the down most part of its cycle. With the knee straight, and the leg completely outstretched. So, yes, your legs should be straight when riding a bike. However, some people recommend maintaining a slight bending of the knee.