Repair notes

Getting Stubborn Pedals Off Without Destroying Your Bike (or Your Knuckles)

I spent twenty minutes last Saturday in my freezing garage trying to remove a pedal that hadn't been touched in probably three years. My hands were numb, I'd already barked my knuckles twice on the chainring, and I was seriously considering just buying a new crankset. Then I remembered to actually think about what I was doing instead of just yanking on the wrench like a caveman. Pedals seem simple until they're stuck, and then they become this infuriating puzzle that tests both your patience and your understanding of reverse threading. Here's what actually works when you're dealing with pedals that absolutely refuse to budge.

The Threading Thing That Trips Everyone Up

Before you do anything else, burn this into your brain: the drive side pedal (right side) loosens counterclockwise like normal, but the non-drive side pedal (left side) loosens clockwise. I still have to think about this every single time. The left pedal has reverse threading so it doesn't unscrew itself while you're riding. When you're standing behind the bike looking at the crank arms, both pedals loosen toward the back of the bike. That's the easiest way I've found to remember it. I've watched people absolutely crank down in the wrong direction, making their problem infinitely worse, so just take a breath and think about which way you're turning before you commit all your strength to it.

Penetrating Oil Is Your Best Friend

If the pedals haven't been off in a while, spray penetrating oil where the pedal threads into the crank arm and let it sit. Not for thirty seconds while you grab your wrench, I mean actually let it sit for at least fifteen minutes, ideally a few hours or overnight if you're not in a rush. I use whatever penetrating oil I have on hand, nothing fancy. Spray it, let gravity and capillary action do their thing, then come back to it. I've had pedals that seemed absolutely welded in place come off relatively easily after a good soak. The oil needs time to work its way into the threads. If you try to force it immediately, you're just fighting corrosion and dried grease with pure stubbornness, and the corrosion usually wins.

Leverage and Angle Matter More Than Strength

Get a proper pedal wrench, not an adjustable wrench. The 15mm pedal wrench is thin enough to fit in the space between the pedal and crank arm, and it's long enough to give you actual leverage. Position the crank arm so your wrench is pushing toward the front of the bike (same direction as pedaling for the drive side, opposite for non-drive side). This gives you the most leverage and the most control. I usually put the crank arm roughly horizontal or pointed slightly forward. Then, instead of trying to muscle it with just your arms, position yourself so you can push down with your body weight. Sometimes I literally stand on the wrench for pedals that are really stuck. Just make sure the bike is stable first. I lean it against my workbench and brace it with my other hand so it doesn't tip over while I'm applying pressure.

When Nothing Else Works

If you've soaked it in penetrating oil, you're turning the right direction, and you're using good leverage but it still won't budge, try heat. A heat gun carefully applied to the crank arm around the pedal threads can expand the aluminum enough to break the corrosion's grip. Don't go crazy with it, just warm it up well. Keep the heat away from any plastic or rubber parts. After heating, let it cool for just a minute so you can touch it, hit it with more penetrating oil, and try again. In really severe cases, I've had to do the heat and oil cycle twice. The absolute last resort is an impact wrench if you have access to one, but be careful because you can strip the threads in your crank arm if you're not paying attention. I've only had to go that route once, on a bike that had spent several winters outside. Some pedals are just sacrificial at that point, but at least you can get them off and move on.

Questions people ask me