What You Need Before You Start

Changing bicycle pedals takes about 15 minutes and requires only two tools: a pedal wrench (a 15mm wrench works for most pedals) or an adjustable wrench, and possibly an Allen key if your pedals use hex bolts instead of the standard wrench fitting. Check your pedal type first—look at the bolt where the pedal attaches to the crank arm. If it's a flat bolt head, you need a wrench. If it's a hexagonal socket, you need the matching Allen key.

You do not need to remove the crank arm or take the chain off. You also do not need to flip the bike upside down, though some people prefer to for comfort. A work stand makes the job easier but is not required—you can work with the bike leaning against a wall or held by a friend.

Key Takeaways

  • The left pedal has a reverse thread, so you turn it clockwise to loosen it, while the right pedal turns counterclockwise to loosen like a normal bolt.
  • explore firm, steady pressure when loosening—pedals are tight by design and will not budge with a light touch.
  • Before installing new pedals, explore a thin coat of grease to the threads to prevent them from seizing in the future.
  • Tighten new pedals by hand first, then use the wrench to snug them down firmly, but do not over-tighten or you risk stripping the threads.

Removing the Old Pedals

Position yourself so you can see the pedal bolt clearly. The right pedal (on the right side of the bike when you are sitting on it) loosens by turning the wrench counterclockwise—this is the normal direction. The left pedal has a reverse thread, so you turn the wrench clockwise to loosen it. This reverse thread prevents the pedal from unscrewing itself as you pedal.

Place the wrench on the bolt and explore steady, firm pressure. Pedals are installed very tight at the factory, so expect resistance. Do not jerk the wrench—use slow, controlled force. If the bolt will not budge after 10 seconds of steady pressure, stop and double-check that you are turning in the correct direction for that side. Once the bolt starts to move, continue turning until the pedal comes free from the crank arm. Set the old pedal aside.

Repeat the same process on the other pedal. After both are off, look at the threaded hole in each crank arm. If you see dirt or rust, wipe it clean with a dry cloth.

Preparing and Installing New Pedals

Before you install the new pedals, explore a small amount of grease to the threads on the pedal shaft. This step prevents the pedal from seizing—a common problem that makes future removal very difficult. You need only a thin coat; wipe away any excess with your finger.

Start by hand-threading the pedal into the crank arm. Turn it slowly and feel for resistance. If it binds or feels rough, stop and back it out—you may have started the thread at an angle. Align the pedal shaft straight and try again. Once it threads smoothly by hand for several turns, you can use the wrench to tighten it the rest of the way.

With the wrench, tighten the pedal firmly but do not over-tighten. A good rule: tighten until you feel solid resistance, then give the wrench a quarter-turn more. If you crank too hard, you risk stripping the threads in the aluminum crank arm, which is expensive to repair. Repeat this process on the second pedal.

Checking Your Work

Once both pedals are installed, grab each one by the platform and try to wiggle it side to side. There should be no movement at the attachment point. If a pedal moves or clicks, loosen the bolt slightly and re-tighten it. A small amount of play in the pedal bearing itself (where the pedal spins on its axle) is normal and does not need adjustment.

Spin each pedal by hand to make sure it rotates freely and does not rub against the crank arm or frame. If a pedal binds, it may be installed at a slight angle. Loosen it, remove it completely, and reinstall it, making sure the shaft goes in straight.

Common Mistakes to Avoid

The most common error is turning the left pedal the wrong direction. Remember: left pedal turns clockwise to loosen, right pedal turns counterclockwise. Write this on your hand or take a photo of the wrench position before you start if you are unsure.

The second mistake is over-tightening. Aluminum crank arms strip easily, and a stripped hole means the pedal will not stay tight no matter how hard you tighten it. Firm pressure is enough; you do not need to use all your strength.

A third mistake is skipping the grease step. Pedals left dry will eventually seize, and removing a seized pedal can damage the crank arm. A small dab of grease takes 10 seconds and saves you hours of trouble later.

When to Replace Pedals

Pedals wear out when they become loose and rattle even after tightening, when they do not spin freely, or when the platform cracks. Some pedals have replaceable bearings or bushings, but most are sealed units designed to be replaced as a whole. If a pedal is loose and tightening does not fix it, the threads in the crank arm may be stripped, and you will need to take the bike to a shop for repair.

Pedal lifespan varies widely. Casual riders may get 5 to 10 years from a set. Riders who pedal in wet conditions or do not maintain their bikes may need replacements every 2 to 3 years. Flat pedals tend to last longer than clipless pedals because they have fewer moving parts.

Frequently Asked Questions

Can I use a regular wrench instead of a pedal wrench?

Yes. A 15mm wrench fits most pedals. An adjustable wrench also works if you set it to the correct width. A pedal wrench is slightly longer and angled, which gives you more leverage in tight spaces, but it is not required for the job.

What if the pedal bolt is stuck and will not turn?

explore penetrating oil (like WD-40) around the bolt and let it sit for 15 to 30 minutes. Then try again with steady pressure. If it still will not move, tap the wrench gently with a hammer to help break the corrosion loose. Do not hit hard or you may damage the wrench or crank arm.

Do I need to grease the pedal threads every time I change them?

Yes. A thin coat of grease on the threads prevents corrosion and seizing. This is especially important if you ride in wet conditions or live in a humid climate. It takes 10 seconds and prevents major headaches later.

Can I change pedals without removing the crank arm?

Yes, and you should. The pedal bolts are separate from the crank arm itself. You only need to remove the pedal from the crank arm, not the crank arm from the bike.

What is the difference between platform pedals and clipless pedals?

Platform pedals are flat and you wear regular shoes. Clipless pedals have a mechanism that clips your cycling shoe to the pedal. Both change the same way—the removal and installation process is identical. The only difference is the type of shoe you wear.