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Old 10-09-08, 09:19 AM   #1
due ruote 
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Correct spindle length for a Stronglight 93?

I'm looking for an ISO cartridge unit to use with a 93 crankset. Anyone know the right length? Thanks.
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Old 10-09-08, 09:35 AM   #2
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Standard Stronglight spindle length for a mod. 93 double crankset is 118mm. I've gotten away with narrower, but that depends on your frame's chainstay clearance.

Neal
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Old 10-09-08, 09:51 AM   #3
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I agree with Neal that 118mm is the correct length. Both my Gitane TdF and PX10 came with 93's and 118mm Stronglight spindles.

Has anyone seen a Stronglight 93 triple? I understand that they exist, but I've never seen one.
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Old 10-09-08, 10:10 AM   #4
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Quote:
Originally Posted by Dirtdrop View Post
I agree with Neal that 118mm is the correct length. Both my Gitane TdF and PX10 came with 93's and 118mm Stronglight spindles.

Has anyone seen a Stronglight 93 triple? I understand that they exist, but I've never seen one.
I put one together for one of my Gitane TdF's.
I know the large ring is 52t, the small ring is 38t, but I don't remember what I used for the middle ring...probably 47t.

Attached is a photo of one(not mine) that I saved from somewhere.

Regarding the spindle length; I don't remember if the original Stronglight spindle is symmetric. If it is not, a different length in a cartridge bb may be required.
Attached Images
File Type: jpg stronglight93triple.jpg (84.3 KB, 22 views)

Last edited by Sierra; 10-09-08 at 10:48 AM.
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Old 10-09-08, 10:11 AM   #5
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Originally Posted by Dirtdrop View Post
Has anyone seen a Stronglight 93 triple? I understand that they exist, but I've never seen one.
Velobase shows a triple: http://www.velobase.com/ViewSingleCo...m=115&AbsPos=0

I actually have the bolts for a triple, but I'd guess the smallest 122bcd ring you could find isn't that small!

Neal
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Old 10-09-08, 10:16 AM   #6
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I'd guess the smallest 122bcd ring you could find isn't that small!

Neal
The smallest ring available for the 93 is 38t.
They are getting quite hard to find.
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Old 10-09-08, 10:19 AM   #7
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Originally Posted by Sierra View Post
The smallest ring available for the 93 is 38t.
They are getting quite hard to find.
That's good to know. And it makes me think I'd just as likely run a 48/38 double than a triple that's a half-step plus sorta-granny.

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Old 10-09-08, 10:29 AM   #8
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I currently have a 93 triple... sort of... where the largest ring is actually a Stronglight chain guard... followed with 52/42 rings. It has a 125 BB spindle (the races/cones? are exactly the same width as the 118 spindle I have) The drive side is just a little bit longer.
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Old 10-09-08, 10:41 AM   #9
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Quote:
Originally Posted by Dirtdrop View Post
I agree with Neal that 118mm is the correct length. Both my Gitane TdF and PX10 came with 93's and 118mm Stronglight spindles.

Has anyone seen a Stronglight 93 triple? I understand that they exist, but I've never seen one.
Now I'm confused. I found the original cup and cone BB (this is from my 1973 Raleigh Gran Sport that I'm thinking about un-fixing) and it's a 125 spindle. Maybe they put a triple spindle on my bike?

I converted the bike so long ago I don't have any recollection of what the chainline was like, or how much inner ring clearance there was. I'm the original owner, and I'm certain it's the original spindle.

The old cups are showing a bit of wear, but maybe I'll just use the old BB for now and see how it works out.

[edit] dbarnblatt and I were simul-posting. Mine once upon a time had the chainguard as well, so maybe 125 was standard length for that setup.
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Old 10-09-08, 10:45 AM   #10
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Quote:
Originally Posted by dbarnblatt@usa. View Post
I currently have a 93 triple... sort of... where the largest ring is actually a Stronglight chain guard... followed with 52/42 rings. It has a 125 BB spindle (the races/cones? are exactly the same width as the 118 spindle I have) The drive side is just a little bit longer.
That's what I used to build my triple. I just substituted the large ring for the guard.

For Neal;
I realize that it's kind of pointless. I've just been fascinated by triples since I youngster in the early sixties when they were so rare. Haven't quite gotten over it yet. I also have a TA quad.

Last edited by Sierra; 10-09-08 at 10:49 AM.
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Old 10-09-08, 11:32 AM   #11
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[edit] dbarnblatt and I were simul-posting. Mine once upon a time had the chainguard as well, so maybe 125 was standard length for that setup.
Yup, that sounds like the answer to your 125mm spindle question. The Gran Sport does show those chainguards in the catalogues.

Hmm, I do have one of those chainguards, so I suppose I could make use of my mod 93 triple bolts.

Neal
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Old 10-09-08, 12:12 PM   #12
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So now it seems my options are:

1. use the old cup/cone BB, which will put the rings outboard of their proper position by several mm, as I'm not using the guard.

2. try to find an ISO cartridge unit that's 118 or close. 115 is the best I've been able to locate so far. (Miche, C. Veloce)

3. use a 115 JIS taper cartridge unit, which would put the crank arm very close to the 118mm ISO mark. The benefit of this option is I already have the BB unit. Plus, the crankset is currently mounted on a JIS spindle, so I might do better to leave it that way than to go back to ISO(?)

Thanks for the help.
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Old 10-09-08, 01:46 PM   #13
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Originally Posted by Sierra View Post
I also have a TA quad.
Fascinating. What are you using for a front derailleur?
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Old 10-10-08, 06:46 PM   #14
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Sorry for the late reply.

I don't have the crank on a bike yet. When I have more time I plan to try to fit it to my 1971 P15 Paramount tourer to see if I can make it work.

The guy I bought it from had it on a tandem. He told me the front derailleur that he used but I have forgotton what it was. I remember it was Japanese though.
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Old 10-11-08, 10:22 AM   #15
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I'm pretty sure the Stronglight spindle that I removed from my girlfriend's '72 PX10 was 120mm. It was badly pitted and threw it away a long time ago, hence I can't check for you.
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Old 10-11-08, 05:00 PM   #16
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In the interest of making the thread more useful for archives, I'll mention that I found Stronglight JP400 ISO cartridge units at XXCycle in a bunch of lengths, incl. 119mm.

If anyone has used one of those and can comment, that would be appreciated. Thanks.
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