# How To Tell If My Pedals Are 1/2 Or 9/16

If you’re wondering how to tell if your pedals are 1/2 or 9/16, there are a few things you can look for. First, check the size of the spindle on the pedal. If it’s 15mm, it’s 1/2. If it’s 18mm, it’s 9/16. You can also look at the threads on the pedal. If they’re fine and close together, it’s 1/2. If they’re course and widely spaced, it’s 9/16. Finally, you can measure the width of the pedal. If it’s 38mm, it’s 1/2. If it’s 44mm, it’s 9/16.

## How Can You Tell If Your Pedals Are 1/2 Or 9/16?

If you’re not sure if your pedals are 1/2 or 9/16, there are a few ways you can check.

The first way is to look at the size of the spindle. A 1/2spindle is about 12.7mm in diameter, while a 9/16spindle is about 15.9mm in diameter.

Another way to tell is by looking at the threading. A 1/2pedal will have 20 threads per inch, while a 9/16pedal will have 24 threads per inch.

Finally, you can measure the width of the pedal. A 1/2pedal is about 30.5mm wide, while a 9/16pedal is about 33.5mm wide.

If you’re still not sure, your best bet is to take the pedal to a bike shop and have them help you figure it out.

## How Do You Know If Your Pedals Are 1/2 Or 9/16?

If you’re not sure whether your pedals are 1/2 or 9/16, there are a few ways to tell. The first is to look at the size of the spindle. A 1/2spindle will be about half the width of a 9/16spindle. The second is to measure the diameter of the threads. 1/2pedals will have 20tpi (threads per inch), while 9/16pedals will have 24tpi. Finally, you can also tell by the size of the wrench required to tighten or loosen the pedals. A 1/2pedal will require a 15mm wrench, while a 9/16pedal will require a 17mm wrench.

So

### Why does it matter whether your pedals are 1/2 or 9/16?

Pedals are one of the few parts on your bike that are sized in metric, so they can be a bit confusing. The important thing to know is that 1/2pedals will only work with cranks that have a 1/2spindle, while 9/16pedals will work with both 1/2and 9/16spindles. If you have a 1/2spindle and try to use 9/16pedals, they will be very loose and could fall off while you’re riding. Likewise, if you have a 9/16spindle and try to use 1/2pedals, they will be very tight and could damage the threads on your cranks.

So

### How can you make sure you get the right size pedals for your bike?

If you’re not sure, it’s always best to err on the side of a larger size. That way, you can use the pedals with either size cranks. If you’re still not sure, your local bike shop should be able to help you out.

## How To Determine If Your Pedals Are 1/2 Or 9/16?

It’s easy to determine whether your pedals are 1/2or 9/16. Just look at the size of the spindle on the pedal. If it’s 9/16, then you have 9/16pedals. If it’s 1/2, then you have 1/2pedals.

For example, if you’re looking at a pedal and the spindle is 9/16, then you know that the pedal is 9/16.

## Is There A Way To Tell If Your Pedals Are 1/2 Or 9/16?

It’s a common question we get here at the shop:

### Is there a way to tell if your pedals are 1/2 or 9/16?

The answer is yes, there is a way to tell. Here’s a quick and easy guide:

If your pedals have a flat surface on the bottom, they are most likely 1/2. If your pedals have a smaller, concave surface on the bottom, they are most likely 9/16.

Here’s a real-life example:

I have a pair of Shimano SPD pedals that I use for my road bike. These pedals have a small, concave surface on the bottom, so I know they are 9/16. I also have a pair of Wellgo platform pedals that I use for my mountain bike. These pedals have a flat surface on the bottom, so I know they are 1/2.

Knowing whether your pedals are 1/2or 9/16is important because it will determine what size wrench or pedal wrench you need to remove them. Most pedal wrenches will work with either size, but it’s always good to double-check before you head to the store.

Happy wrenching!

### Conclusion

If you are unsure of the size of your pedals, it is best to measure them with a ruler or tape measure. If your pedals are 1/2 inch in diameter, they will fit into a 1/2 inch pedal wrench. If your pedals are 9/16 inch in diameter, they will fit into a 9/16 inch pedal wrench.

If you’re unsure whether your pedals are 1/2 or 9/16, hopefully this explanation has been of some help. If you still have any questions, please don’t hesitate to ask in the comments section below.