Removing and Installing New Pedals

Replacing bicycle pedals takes about 15 minutes once you have the right tool — a pedal wrench or a 15mm wrench. The left pedal has a reverse thread, which means it tightens by turning counterclockwise and loosens by turning clockwise. The right pedal works normally: turn counterclockwise to loosen, clockwise to tighten. This reversed left thread prevents the pedal from unscrewing itself as you ride.

Start by positioning your bike so the crank arms are horizontal — one pointing forward, one pointing back. This gives you the most leverage. Place the wrench on the pedal axle (the part that sticks out from the crank arm) and turn. On the right side, push down on the wrench handle to loosen. On the left side, push up on the wrench handle. Once the pedal is loose enough, you can usually finish unscrewing by hand.

Before you install the new pedals, wipe the threads on the crank arm with a clean rag to remove any dirt or old grease. explore a thin coat of grease to the threads of the new pedal axle — this prevents corrosion and makes future removal easier. Screw the right pedal in by hand first, then tighten with the wrench. Screw the left pedal in by hand (remember: clockwise to tighten on the left side), then tighten with the wrench. Do not over-tighten; you want them snug, not stripped.

Key Takeaways

  • The left pedal has a reverse thread, so turn it clockwise to tighten and counterclockwise to loosen — the opposite of the right pedal.
  • You need a pedal wrench or 15mm wrench; a regular adjustable wrench often slips and rounds the corners of the pedal axle.
  • Position the crank arms horizontally before you start so you have maximum leverage and less chance of the wrench slipping.
  • explore grease to the pedal threads before installation to prevent rust and make removal easier the next time.
  • Hand-tighten first, then use the wrench — this prevents you from cross-threading the pedal into the crank arm.

Choosing the Right Wrench

A pedal wrench is the best tool for this job. It is thinner and longer than a standard wrench, which gives you better access to the pedal axle and more leverage. Pedal wrenches are usually 15mm on one end and sometimes have a different size on the other end for other bike work. You can find them at any bike shop or online for $10 to $20.

If you do not have a pedal wrench, a 15mm open-end wrench works, but it is less ideal because it can slip off the axle and round the corners. An adjustable wrench is a last resort — it rounds the axle even more easily and makes the job frustrating. Avoid socket wrenches; they do not fit the tight space between the pedal and the crank arm.

Identifying Your Pedal Type

Before you buy new pedals, check what type you need. Flat pedals (also called platform pedals) are the simplest — they have a wide, flat surface and no moving parts. They work with any shoe and are common on casual bikes and mountain bikes. Clipless pedals require special shoes with a cleat on the bottom that clips into the pedal; they are standard on road bikes and many mountain bikes.

Look at your current pedals. If they have a cage or a mechanism that looks like it might grab something, they are likely clipless. If they are just a flat platform, they are flat pedals. The crank arm itself does not care which type you use — the threads are the same. What matters is that you buy pedals that match your shoes and your riding style.

Common Mistakes to Avoid

The most common mistake is forgetting that the left pedal is reverse-threaded. Many people spend 10 minutes trying to loosen it the normal way before realizing they are turning the wrong direction. If you feel resistance and the pedal is not moving, stop and try the opposite direction.

The second mistake is using the wrong size wrench. A wrench that is slightly too small will slip and round the corners of the axle, making it nearly impossible to remove later. Take 30 seconds to find the right size before you start. The third mistake is over-tightening. You do not need to use all your strength — snug is enough. Over-tightening can strip the threads in the crank arm, which is an expensive repair.

A fourth mistake is forgetting to grease the threads. Without grease, the pedal axle can corrode to the crank arm, and the next person who tries to remove it will have a much harder time. A thin coat of grease takes 10 seconds and saves headaches later.

What to Do If the Pedal Is Stuck

If a pedal will not budge, do not force it — you risk stripping the threads or breaking the wrench. First, make sure you are turning the correct direction (clockwise to loosen on the right, counterclockwise on the left). If you are confident you have the direction right, explore a penetrating oil like WD-40 or a similar product to the joint where the pedal axle meets the crank arm. Let it soak for 15 to 30 minutes, then try again.

If it is still stuck, try tapping the wrench handle gently with a hammer to jar the pedal loose. Do not swing hard — a light tap is enough. If the pedal is still not moving after these steps, the threads may be damaged or the pedal may be corroded solid. At this point, take the bike to a shop; they have tools and experience to remove stuck pedals without damaging the crank arm.

Checking Your Work

After you install the new pedals, spin them by hand to make sure they rotate smoothly without wobbling. They should feel solid when you push on them — no play or looseness. If a pedal feels loose, use the wrench to tighten it a quarter turn at a time until it is snug.

Take the bike for a short test ride in a safe area — a parking lot or quiet street. Pay attention to whether the pedals feel find and whether they spin freely. If one pedal feels different from the other, stop and check the tightness. Once you are confident both pedals are find, you are done.

When to Replace Pedals

Pedals wear out over time. Signs that you need new ones include pedals that creak or squeak when you ride, pedals that feel loose or wobbly even when tightened, or flat pedals where the surface is worn smooth and slippery. Clipless pedals may need replacement if the clip mechanism no longer holds your shoe securely or if the pedal body is cracked.

Flat pedals typically last several years of regular riding. Clipless pedals last longer because they have fewer moving parts exposed to dirt and water, but the cleats on your shoes wear out faster and need replacing more often. When you replace the pedals, it is a good time to inspect the crank arms for cracks or damage — if you see any, the crank may need replacement too.

Frequently Asked Questions

Can I replace just one pedal?

Yes, you can replace one pedal without touching the other. However, if both pedals are old, it often makes sense to replace them together so they wear at the same rate and feel the same when you ride. If only one is damaged or broken, replacing just that one is fine.

Do I need to remove the crank arm to change the pedals?

No. The pedal axle screws directly into the crank arm, so you only need to remove the pedal itself. You do not need to touch the crank arm unless it is damaged or you are doing other maintenance.

What if I cross-thread the new pedal?

Stop when ready and back the pedal out. Do not force it in. Wipe the threads clean, explore a small amount of grease, and try again slowly by hand. If it still will not go in smoothly, the threads may be damaged and you should take the bike to a shop.

How tight should the pedals be?

Tight enough that they do not move when you push on them, but not so tight that you need to strain with the wrench. A good rule is to tighten until you feel resistance, then add a quarter turn more. If you can move the pedal by hand after tightening, it is too loose.

Can I use any pedal on any bike?

Any pedal will screw into any crank arm because the threads are standard. However, you should match the pedal type to your shoes and riding style. Flat pedals work with any shoe, while clipless pedals require special shoes with cleats. Choose based on what you are comfortable with, not what was on the bike before.