Readers ask: How To Determine Bike Pedal Axle Size?

How do you tell if my pedals are 1 2 or 9 16?

If the cranks are THREE PIECES, meaning two crank arms bolted to a spindle, it will be 9/16 thread on the pedals. If the crank is ONE piece through a large bottom bracket housing, it’s 1/2 thread.

How do I know what size spindle for my pedals?

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 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).

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What size is the nut on a bicycle pedal?

Pedal wrench flats are typically 15mm in size. 9/16″ (~14.3mm) is somewhat common on older pedals. 17mm and other sizes have been used, but you aren’t very likely to encounter them.

Are all pedals 15mm?

The flats on almost all modern pedals take a 15mm spanner, though many pedal spanners also have a 9/16-inch jaw for older pedals.

Why are 3 piece cranks better?

One-piece cranks have non-sealed bottom bracket bearings that get contaminated easily. In different, 3 piece cranks come with sealed bearings protected from the elements. The result is smoother pedaling.

What is the standard bike pedal 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.

Do you need pedal wrench?

All modern pedals will screw into the crank arm using either one of two tools. Most pedals (like our reliable Thump flat pedals) require a pedal wrench, which is a long, thin tool specifically designed to fit the external spindle flats between the pedal and the crank leg (fig. 3).

Are there different size mountain 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.

Why does my bike squeak when I pedal?

That creaky squeaking you hear as you pedal “could mean that [your bike] has a dry chain or bearings,” Yozell says. Cleaning and lubing your chain is usually a good place to start with any weird noise, but if it doesn’t solve the squeak, you may need to maintain or replace some bearings (see below).

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Which pedal is reverse thread?

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.

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).

What can I use instead of a pedal wrench?

But if your pedals aren’t super stuck right now, a cone wrench would work fine for your trip and would be way smaller and lighter than a proper pedal wrench.

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