What Size Are Bike Pedal Threads?

Are all bike pedal threads the same size?

Thread Sizes Most pedals have 9/16″ x 20 tpi threads. Pedals for one-piece cranks are 1/2″ x 20 tpi. Older French bicycles used a 14 mm x 1.25 mm thread, but these are quite rare. French-threaded pedals are commonly labeled “D” and G” (French for “droite” and “gauche” (right and left).

How do I know what thread 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.

Are bike pedal threads universal?

Yes, pedals are universal for mountain bikes. But this depends on the type of crankset you have. A 1-piece crankset uses 1/2′ inch in diameter pedals. Two piece and three piece cranksets use a 9/16′ inch in diameter pedals.

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What are the threads on a bike pedal?

It is important to remember that pedal threads are different from left side and right side. The right side pedal has a right-hand thread (removes counterclockwise, installs clockwise). The left side pedal has a left-hand thread (removes clockwise, installs counterclockwise).

Are all bike pedals compatible?

First things first, the good news is that 98% of the pedals you can buy today are interchangeable with standard bicycle cranks. They prety much all use the 9/16″ x 20 tpi (threads per inch).

Are there different sizes of bike pedals?

When it comes to pedal sizes, there are two sizes: ½” and 9/16”. ½” pedals are only used on very basic bikes with a one piece crank. A one piece crank is just that, it’s one piece of steel that is bent/forged to run from one pedal, through the frame, to the other pedal.

How do I know what size axle I need for my bike?

Measure the straight length of your axle shaft. Do not include the axle head or tapered spacer, if there is one. Axle length is not the same as hub length. A bike with a 12×142 hub standard will have a significantly longer axle since it will have to go through the frame on both sides of the 142mm wide hub.

How are threads measured?

Steps

  1. Measure an inch-long portion of the threaded area. Grab a ruler and lay it along the bolt or screw.
  2. Count the number of threads in 1 inch.
  3. Measure the diameter and the length of the threaded area.
  4. Plug the information into a standard measurement.
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Are bike pedals reverse threaded?

Remember, the left pedal spindle is reverse threaded. Turn it clockwise to remove the pedal when facing the crank arm. The right side is normal, so turn it anti-clockwise to loosen it.

Can you put clipless pedals on any bike?

If you have several bicycles, you might want to purchase clipless pedals for the ones you ride most so that you can use your clipless shoes (and enjoy all the benefits of going clipless) regardless of which bike you choose to ride.

Why does my bike pedal keeps falling off?

Best case scenario: Your pedal is just loose. You can tighten it with a pedal wrench (some pedals can use a hex wrench) — however note that the left pedal is left-hand threaded so it’ll be the reverse of what you are used to. Thus, you have to screw it counter-clockwise to tighten it.

Do bike pedals screw on clockwise?

At a Glance: Use a pedal wrench or hex key to unscrew the pedals from the crank arms. Right pedals loosen by turning counter-clockwise, left pedals loosen clockwise. Apply bike grease to the new pedals and screw them in at an even 90 degree angle.

Why are pedal threads reversed?

The right-side (usually the drive-side) pedal spindle is right-hand threaded, and the left-side (usually the non-drive-side) pedal spindle is left-hand (reverse) threaded to help prevent it from becoming loose by an effect called precession.

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