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My pedal wrench fits a bit loosely?

Old 10-10-12, 11:45 PM
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Turtle Speed
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My pedal wrench fits a bit loosely?

So I was working on getting the pedals off a bike and I noticed that my 15mm pedal wrench fits just a little bit loosely on the wrench flats. It's a department store bike, but it does have a 3-piece crank.

My question is, is there any chance the pedal flats on this bike are actually 9/16"? I read that 9/16" flats are usually associated with pedals on one-piece crank bikes. But 15mm comes out to 0.59", and 9/16" is 0.56". So if this bike does use the 9/16" for some reason, that would seem to fit an explanation of why my wrench seems to have a little bit of play in it...

And yes, I'm aware of the reverse thread on the left pedal, so it's not something as simple as that.

Sorry for the really basic question, but I couldn't seem to find the answer for sure. The reason I ask is because the right pedal is REALLY stuck tight, and I don't want to ruin my wrench by pulling with gorilla force when it doesn't fit right.



(P.S. - any tips on loosening up that right pedal would be helpful. This bike has been through a couple rough winters and may have some significant rust/corrosion going on. I'm guessing the threads were never lubricated during installation either. I was thinking of blasting it with a WD40 spraydown to try to break up anything that's making it seize up - I don't care if it attacks the pedal grease, since I was getting ready to clean out and repack the pedal bearings anyway.)
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Old 10-10-12, 11:59 PM
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3alarmer
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The flats for the wrench on a 9/16" pedal (the bigger ones) are 15mm.

The flats for the wrench on a 1/2" pedal (the smaller ones, like you said,
usually found in one piece cranks) are 9/16" I think.

It is unlikely that this is your issue but i suppose anything is possible on a
__________mart bike.
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Old 10-11-12, 12:34 AM
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Turtle Speed
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Thanks for the response. I'm hoping it's not my issue either cuz I don't want to have to buy a different tool to work with 9/16" pedal flats, ha. I don't have a 9/16" wrench that I can just borrow really fast to test it, either.

How tightly is a 15mm pedal wrench supposed to be be fitting on wrench flats? Like super-perfect, very-difficult-to-get-it-on tight, or should there be just a tiny bit of wiggle? My 15mm pedal wrench is a Park multi-tool, so I'm hoping it's not like it was machined imprecisely...

Another WTF moment for me with these pedals: I pried the plastic cap off and was expecting to see a nut. Instead, there's these circular metal things:



Any way to get this thing off so I can get at the bearings? I can't seem to grip it or move it, and it just spins and spins all day on me.
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Old 10-11-12, 03:50 AM
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That's a rivet. You're not getting it off.
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Old 10-11-12, 03:59 AM
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ride those $10 pedals until they explode then just replace them.
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Old 10-11-12, 05:36 AM
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Originally Posted by catonec View Post
ride those $10 pedals until they explode then just replace them.
If you figure out how to get them off.
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Old 10-11-12, 06:23 AM
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I have found a regular wrench or adjustable ones work well on dept. store bikes...try that and a hammer before getting a new fancy tool.
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Old 10-11-12, 07:56 AM
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If all else fails, clamp a big Vise-Grip on the spindles and remove them with it. Damage? Sure but the pedals aren't worth much and aren't servicable anyway.
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Old 10-11-12, 05:45 PM
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Originally Posted by Turtle Speed View Post
Any way to get this thing off so I can get at the bearings?
No bearings probably, just a plain plastic bushing...
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Old 10-11-12, 08:03 PM
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Turtle Speed
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Thanks for the replies, everyone. I feel a bit less stupid now that I know the pedal isn't serviceable.

And for the record, I got a chance to try the fit of my 15mm pedal wrench on a decent $250 department store bike as well a Trek, and it still had a teeny bit of give, so I'm guessing that's just how it's supposed to be.
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Old 10-11-12, 08:43 PM
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No...you are right, 9/16" is a valid size...if the wrench fits, use it. Used on smaller stuff, pretty much stuff smaller then 15 mm.
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