which bb is which?
01-09-06, 09:43 PM
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which bb is which?
A few weeks ago I purchased two phil wood bottom brackets. One is for a campy record crank (iso) and the other is for a sugino set (jis). Problem is that I've forgotten which is which. One tapers nearly all the way to the bb body, the other has 'shoulders' about 1/2 way from the spindle tip to the body. Any help would be greatly appreciated by my wife, who would rather not have my bike stuff all over the living room; and my be, who would rather not ruin a new crankset.
01-09-06, 10:20 PM
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Hopefully, there's enough info here to distinguish the two:
https://www.parktool.com/repair/readhowto.asp?id=97
Note thread direction and diameters.
https://www.parktool.com/repair/readhowto.asp?id=97
Note thread direction and diameters.
Last edited by MudPie; 01-09-06 at 10:32 PM.
01-09-06, 11:49 PM
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Originally Posted by MudPie
Hopefully, there's enough info here to distinguish the two:
https://www.parktool.com/repair/readhowto.asp?id=97
Note thread direction and diameters.
https://www.parktool.com/repair/readhowto.asp?id=97
Note thread direction and diameters.
01-10-06, 12:10 AM
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I run Sugino cranks and am looking at a spindle from a recent BB overhaul. There is an even taper for about 15 mm that ends in a abruptly sloped 3mm long shoulder.
01-10-06, 12:33 AM
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I think I've got it. I gently put the crank on both bb's. It went about 3 mm further onto one of them. That one is the ISO (same taper, but smaller initial diameter.) That means the other is JIS.
01-10-06, 11:49 AM
#7
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I think you are right if I follow what you are saying...
But the easy way to tell is the JIS has a longer 'tapered' section on it, therefore extending further into the crank. Good luck-
But the easy way to tell is the JIS has a longer 'tapered' section on it, therefore extending further into the crank. Good luck-
