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PostPosted: Sat Sep 18, 2010 8:09 pm 
Retro Guru

Joined: Sat Aug 15, 2009 9:30 pm
Posts: 413
Location: Leighton Buzzard
Just tried to put some modern pedals onto my Stronglight 49D cranks. Tried being the operative word - they won't fit.
The Stronglight thread is smaller. So with LOOKs being a no go what are my options?
I think I have some old Campag quill pedals at my parents house, are they likely to fit?
Cheers.


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PostPosted: Sat Sep 18, 2010 8:22 pm 
Moderator /Lincs, E & S Yorks Deputy AEC
Moderator /Lincs, E & S Yorks Deputy AEC
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Joined: Mon Nov 26, 2007 6:16 pm
Posts: 4144
Location: RetroModding™ since 1988
Basically 2 sizes of pedal thread 1/2" & 9/16"

From Sheldon Brown's website:

Thread Sizes

* Most pedals have 9/16" x 20 tpi threads.

* Pedals for one-piece cranks are 1/2" x 20 tpi.

* Older French bicycles used a 14 mm x 1.25 mm thread, but these are quite rare. French-threaded pedals are commonly labeled "D" and G" (French for "droite" and"gauche" (right and left). A French pedal will start to thread into a 9/16 x 20 crank, but will soon bind. Do not force it, or it will damage the crank.


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PostPosted: Sat Sep 18, 2010 9:01 pm 
Old School Grand Master
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Joined: Wed Feb 20, 2008 12:21 pm
Posts: 5784
Location: Lost in Translation
Your old Stronglights will probably have French (14mm x 1.25mm) threads. Because the pitch is so close to BSC, you can have a bike shop run BSC taps through your cranks to take the diameter out to 9/16". Alternatively, scan ebay.fr for some matching (metric) pedals.


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PostPosted: Mon Sep 20, 2010 1:11 am 
Old School Grand Master
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Joined: Wed Feb 20, 2008 12:21 pm
Posts: 5784
Location: Lost in Translation
Lovely pair of metric TA quill pedals here:

http://cgi.ebay.fr/ws/eBayISAPI.dll?Vie ... 0493939272

needle bearings, grease nipple in the dustcap


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