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Question on early 80's French crank.(11 posts)

Question on early 80's French crank.look271
Feb 23, 2003 4:29 PM
Nervais. Great looking crank on my new fixie. However, I can't get the 'friggin pedals to thread onto the crank arms. Am I missing something? The threads don't look stripped and my pedals go into my other cranks fine. They're not OBVIOUSLY different sizes. Just weird French
Wait...wait...there was SOMETHING....cory
Feb 23, 2003 4:49 PM
Oh, man, I can't remember what it was...I used to have a Motobecane with the same brand of crank, and there was something odd about it. "Weird French s*%t" probably comes close...could the hole be 1/2 inch (or close to that in metric; 12.5?) instead of 9/16? If I think of what it was, I'll post it. Meanwhile, measure carefully to see if the hole's a smidge small.
It is a touch small,look271
Feb 23, 2003 5:23 PM
But not as small as some older stuff that I do have pedals for. If there is a size difference, it is REALLY slight. I can get one side started, but it is REAL tight. I don't want to mess up the threads. It is a great looking crank and it keeps with the theme of the bike-it's an old Gitane. mavic steel rims and hubs, some type of French made brakes and the crank, of course. If worse comes to worse, I can put my D/A on it and get a new crank for my Look-I'm itchin' for carbon......
Old French thread?micha
Feb 23, 2003 7:16 PM
Some years ago I rode a French track bike with Stronglight cranks. The pedal threads were 14 x 1.25. When the French pedals wore out, I had the threads recut to 9/16. Worked well.
Old French thread?look271
Feb 23, 2003 7:21 PM
How'd you have it re-cut? LBS? Machinist? Sounds like that's what I have.
Old French thread?micha
Feb 23, 2003 7:29 PM
LBS cut it. The wrench who did it was good, very good. Plus he rode a French bike at the time and did the procedure on his own bike, so he had some experience.
Feb 24, 2003 7:17 AM
There are 2 good LBS's near me that I'll check to see if they can help me out.
I located the required taps once in ...Humma Hah
Feb 28, 2003 11:32 AM
... the McMaster-Carr catalog, a publication that's pretty readily available. I probably can get my hands on a copy if you want me to look them up. They're 9/16 UNF, if I recall correctly.

The catch is, you need two taps, a left-hand and a right-hand one. One is very common, the other rare. I believe they run about $20 each. That being the case, paying the LBS wrench to do the work is probably cheaper.
Took it to the shop today. He told me $10. Love those guys! (nm)look271
Mar 13, 2003 6:23 PM
Por Quoit? I am zee 'old crank francais' ici !!Alexx
Mar 5, 2003 1:06 PM
But, juss to prove eet, let me say thees:
You stupid american persons, you don' know merde about zee threads on beutiful french crank! S'il vous, send a letter to Specialetes TA eef you want un answer.
It is beautiful!look271
Mar 13, 2003 6:24 PM