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French Square Taper?

Old 04-12-06, 12:17 PM
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French Square Taper?

is there anywhere, or does anyone make a french bb with a square taper or non cotter spindle?
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Old 04-12-06, 12:34 PM
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Your question is pretty vague. Sometimes newbies pose poorly-phrased questions because they don't know much (which can't be held against them) but most of the time it's because they're not putting care into writing their question. Perhaps trying to get the question typed and submitted before their boss heads toward their cubicle.

Anyway, I take it you mean french-threaded BB shell - 68mm shell width (same as British ISO standard), but with 35mm X 1mm (25.4 tpi) threading, and both sides threading in clockwise.

There are also two types of square taper standards (independent of BB shell). ISO (used by Campy some some other European makers) and JIS (used by Shimano and most other makers). Both have a 2-degree taper, but ISO is slightly smaller. Not ideally interchangable, though it works for some people in practice.
Your question could have been interpreted to mean a French taper, not a French shell. In which case, specifically french BB crank manufacturers would more likely be ISO.

Anyway, you can get French-threaded BB's from Harris:
https://sheldonbrown.com/harris/frenc...ks.html#bottom
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Old 04-12-06, 12:59 PM
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Maybe you'll find some helpful information here:

https://www.bikeforums.net/classic-vintage/187365-replacing-bottom-bracket-early-70-s-puegeot.html
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Old 04-12-06, 01:17 PM
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Originally Posted by timcupery
Your question is pretty vague. Sometimes newbies pose poorly-phrased questions because they don't know much (which can't be held against them) but most of the time it's because they're not putting care into writing their question. Perhaps trying to get the question typed and submitted before their boss heads toward their cubicle.

Anyway, I take it you mean french-threaded BB shell - 68mm shell width (same as British ISO standard), but with 35mm X 1mm (25.4 tpi) threading, and both sides threading in clockwise.

There are also two types of square taper standards (independent of BB shell). ISO (used by Campy some some other European makers) and JIS (used by Shimano and most other makers). Both have a 2-degree taper, but ISO is slightly smaller. Not ideally interchangable, though it works for some people in practice.
Your question could have been interpreted to mean a French taper, not a French shell. In which case, specifically french BB crank manufacturers would more likely be ISO.

Anyway, you can get French-threaded BB's from Harris:
https://sheldonbrown.com/harris/frenc...ks.html#bottom

wow, i think you know everything

i think you can figure out what i was saying, but thanks for the info, and the dis
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Old 04-12-06, 03:41 PM
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No, your question wasn't clear. It's quite possible, based on your subject and text, that you thought there was a special taper that was specific to French bikes. Nowhere did you mention that this was about the threading or shell size of the BB. I answered the latter because if you were reasonably knowledgable, that's the only thing your question could have meant. However, I didn't have enough information to assume htat you were reasonably knowledgable. I didn't intend to disrespect you, but neither did your question win much respect in the way that it was asked.

When I tell people to phrase their questions more clearly (and I do it fairly often), I don't mean anything against them personally - it's just that we can answer people's questions more easily if they ask the question more specifically.

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Old 04-13-06, 12:58 AM
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alright man, well thanks, i guess i just gotta get used to this forum

the full spectrum of knowledge here is much broader than i am used to...

im used to a bmx forum with a ton of trendy kids that just know bmx and thats about it, they probably assume too much and dont get very specific as well. its just what im used to.

i've seen sheldons website many times, i think i have just decided to keep my bike the way it is now. I converted a 70's 10 speed motobecane into a fixie, while keeping the stock cranks and chainring... ill just stick with that until it breaks of something.. thanks anyway
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Old 04-13-06, 06:49 AM
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No worries, man. Most forums I've seen on the internet are pretty flippant, so lots of people are used to that, but such forums are less likely to answer people's questions or build cumulative knowledge.

Maybe your current BB will last for a long time, maybe it won't. I had an old BB spindle (standard English-threaded shell, though that doesn't affect the spindle much) snap off on me a year ago. Road around one-legged (with toeclips) for a week while a new sealed-cartridge BB was on order...
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Old 04-13-06, 07:12 AM
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Originally Posted by timcupery
Anyway, you can get French-threaded BB's from Harris:
https://sheldonbrown.com/harris/frenc...ks.html#bottom
I have an old Peugeot with french threaded BB. I removed the cottered mess and replaced with a square taper Stronglight purchased from Harris / SheldonBrown. It is singlespeed now and currently my favorite ride.
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Old 04-13-06, 07:37 AM
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An interesting exchange. Tim, you handled it very well.

As to French threaded bottom brackets, anyone have a good estimate when they finally went out of production? I've never seen one and my Sister-in-law's old Motobecane (from the mid-70's I think) came with an English threaded SR bb and crank.
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