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 Post subject: Pedal threads
PostPosted: Sun Mar 24, 2013 10:23 pm 
PoTM Winner
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Joined: Tue Sep 25, 2012 7:21 pm
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Are all crank sets tapped at 9/16x20?


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 Post subject: Re: Pedal threads
PostPosted: Sun Mar 24, 2013 10:36 pm 
Retro Guru

Joined: Sun Aug 22, 2010 7:07 pm
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Must be info somewhere, I remember French bikes having a slightly smaller size.


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 Post subject: Re: Pedal threads
PostPosted: Sun Mar 24, 2013 10:54 pm 
Gold Trader
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Yes, all pedals are 9/16" except french, which are smaller at 14mm x 1.25. There maybe some other obscure types of thread, especially on older bikes, but everything for the last few decades has been 9/16 (except the french parts!)


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 Post subject: Re: Pedal threads
PostPosted: Sun Mar 24, 2013 11:16 pm 
Old School Grand Master
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Joined: Sat Oct 06, 2012 5:17 pm
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Location: Norn Iron
My minimal knowledge says yes they are, except Frech threads but you can use French threads if you put some form of engineering paste on the pedal as you thread it. The pitch of the threads is the difference and not the spacing - the TPI!!

I hope i got that right, no doubt someone with a greater knowledge than me will be able to definitively advise.

Thanks again,

Richard


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 Post subject: Re: Pedal threads
PostPosted: Sun Mar 24, 2013 11:17 pm 
Old School Grand Master
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Not my area of expertise but are Shimano Dyna Drive different as well ?

Shaun


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 Post subject: Re: Pedal threads
PostPosted: Sun Mar 24, 2013 11:26 pm 
Old School Grand Master
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Um, Shimano Dyna Drive are different - in a big way - much larger diameter hole. I doubt that Montello would be that far out though!!! If it is DD, adaptors are available - check the sales thread as i have ordered a pair in the past week.

richard


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 Post subject: Re: Pedal threads
PostPosted: Mon Mar 25, 2013 1:35 am 
Dirt Disciple

Joined: Sun Jan 27, 2013 5:12 am
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Location: Indiana
There is a slight difference between Italian 9/16 x 20 and Japanese 9/16 x 20. I think it is the angles on the points of the threads which will cause a Japanese pedal to thread tight into an Italian crank. Anyone else tried to thread a Shimano SPD pedal into a Campy crank? They work but they're tight.


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 Post subject: Re: Pedal threads
PostPosted: Mon Mar 25, 2013 12:01 pm 
Old School Grand Master
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Location: Completely in the dark, thanks to me good mate Terry....
foz wrote:
Yes, all pedals are 9/16" except french, which are smaller at 14mm x 1.25. There maybe some other obscure types of thread, especially on older bikes, but everything for the last few decades has been 9/16 (except the french parts!)


I think certain BMX cranksets have a peculiar threading too, although that's going slightly OT for the Road part of the forums!

David


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 Post subject: Re: Pedal threads
PostPosted: Wed Mar 27, 2013 4:56 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
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Location: New Forest, UK
Old Yeller wrote:
There is a slight difference between Italian 9/16 x 20 and Japanese 9/16 x 20. I think it is the angles on the points of the threads which will cause a Japanese pedal to thread tight into an Italian crank. Anyone else tried to thread a Shimano SPD pedal into a Campy crank? They work but they're tight.


I found it the other way - threading Campag Gran Sport pedals into a Middleburn RS7 felt tight. Shimano SPDs and MKS pedals threaded easily.


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 Post subject: Re: Pedal threads
PostPosted: Wed Mar 27, 2013 5:36 pm 
rBoTM Winner
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Standard thread for BMX pedals is 1/2 inch, as are some unicycles. The half inch pedal was also common on cruisers I think the commonality came from the one piece cranks.


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