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Discussion Starter · #1 ·
Probably a dumb question but when I take my pedals off my mountain bike I use a 5/8 wrench.
But the threads on my pedals seem to be 9/16.
So..if I were to buy new pedals it's obvious that I want 9/16?
Hmm...sounds like I answered my own question.
And is 9/16 standard for most mountain bikes?
 

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I don't think i've seen any pedals that are any sizes other than 9/16 (although I'm sure they exist). I just checked on my bike and yeah the 5/8 wrench worked while a 9/16 was to small.

So I'd say your in good shape. :thumbsup:
 

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Actually, you need a 15mm wrench.

A 5/8" may work if the pedal is not on too tight.
 

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Ummm not quite.....

Screamer said:
Probably a dumb question but when I take my pedals off my mountain bike I use a 5/8 wrench.
But the threads on my pedals seem to be 9/16.
So..if I were to buy new pedals it's obvious that I want 9/16?
Hmm...sounds like I answered my own question.
And is 9/16 standard for most mountain bikes?
There are two pedal sizes 9/16 most commonly found on mountain and road bikes and higher end BMX bikes, and 1/2 more commonly found on kids bikes, low end walmart stuff, etc.

These sizes do not refer to the wrench flats on the shaft, but the threaded section ONLY. Wrench flats on modern pedals are a standard 15mm for the most part anymore. Back in the "old days" there were pedals produced with 9/16" flats, but they are rarely found, but there are still a few around, not new though. And many pedal wrenches like the Park PW2 still come with both size openings, one for 9/16 and one 15mm. Anyway the wrench flats on your pedals won't change even though the pedal says 9/16. That's the threaded portion of the pedal axel nothing else.

Good Dirt
 

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Discussion Starter · #7 ·
Thanks for the help you guys...I feel better.

The reason for my confusion is because Amazon.com is offering the Shimano M324 clipless/platform pedal at a couple different prices with one ad saying it came with a 9/16 thread and the other ad saying nothing about thread size. I just thought it was a different fit.

http://www.amazon.com/Shimano-PD-M324-Pedals/dp/B000COAY4Q

http://www.amazon.com/Shimano-PD-M324-Pedal-SH-56-Silver/dp/B000F5JP4C/ref=pd_sbs_sg_1

Obviously it's not a big deal and now I know that mountain bike pedals come only one way.
Thanks again.
 
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