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Old 02-13-12, 08:33 PM   #1
yugdlo
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Replacing cup and cone BB with Velo Orange cartridge type

I have a Motobecane that came with a Stronglight competition BB; 118mm ISO taper spindle. I love the looks of the Stronglight 49D crank, but alas old age has crept up on me, and TA rings are just too darned pricey.
Soooo; for the past 3 years or so I have been running a Sakae SA crank, using it as a compact double, 48, 34 chainrings. The crank is JIS tapered but has seemed to work OK; I do occasionally have to tighten the non drive side crank bolts. I am thinking about getting one of the Velo Orange French threaded cartridge BB's and get the crank back on a Jis taper spindle. I still have the original spindle from the SA. It is stamped 3S; a quick visit to Sheldon Browns, vault o knowledge tells me it is 121.5mm long. This may be a rhetorical question, but I assume I will be OK to get the 122mm spindle option from VO, but wanted to throw this out to you all, see what you think.
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Old 02-13-12, 10:06 PM   #2
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Why don't you just reinstall the 118mm ISO taper spindle and your 49D?
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Old 02-13-12, 10:16 PM   #3
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Yes, that should work, however, check to see if the spindle for the SA is symmetrical. If not, you may have clearance issues on the drive side with the VO which is symmetrical.
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Old 02-13-12, 10:34 PM   #4
Bill Kapaun
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The 3S has one end 5.5MM longer than the other.

IF the long end was on the crank, you need a 127MM BB.
IF the short side "" then a 116MM (117)
EDIT-
You'll note that Sheldon's chart gives the symmetrical equivalent on the far right column. That is IF the DS is the LONG side.

Symmetrical equivalent is 52 MM + 2X MM, where X is the DS length.

Last edited by Bill Kapaun; 02-13-12 at 10:39 PM.
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Old 02-14-12, 05:43 AM   #5
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Quote:
Originally Posted by auchencrow View Post
Why don't you just reinstall the 118mm ISO taper spindle and your 49D?
the 49D is 42, 52: I'm running a 34, 48. The VO bottom bracket is cheaper than a set of TA chain rings, and I have not found a 34 tooth TA ring
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Old 02-14-12, 05:57 AM   #6
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Quote:
Originally Posted by Bill Kapaun View Post
The 3S has one end 5.5MM longer than the other.

IF the long end was on the crank, you need a 127MM BB.
IF the short side "" then a 116MM (117)
EDIT-
You'll note that Sheldon's chart gives the symmetrical equivalent on the far right column. That is IF the DS is the LONG side.

Symmetrical equivalent is 52 MM + 2X MM, where X is the DS length.
The longer side was on the drive side. Unfortunately VO does not have a 127mm spindle.
Let me ask this. The spindle that came off the donor bike is still in good shape, and it came out of a 68mm shell, would that spindle work in the Stronglight bb?

Last edited by yugdlo; 02-14-12 at 05:58 AM. Reason: typo
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Old 02-14-12, 03:39 PM   #7
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Quote:
Originally Posted by yugdlo View Post
The longer side was on the drive side. Unfortunately VO does not have a 127mm spindle.
Let me ask this. The spindle that came off the donor bike is still in good shape, and it came out of a 68mm shell, would that spindle work in the Stronglight bb?
Yes, probably without any significant issue, but try it and see. The proof is is in 'le pudding....'
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