Determining correct BB spindle length
02-11-21, 03:58 AM
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Determining correct BB spindle length
I'm building-up my Galmozzi, and facing a quandary: how long should my BB spindle be? I get that it needs to be 70mm to fit the bearing race cups, but the extension beyond that escapes me. I'm fitting a Campag Record Strada crank-set (180mm), and a single 52-tooth Gipiemme chain-ring. The thickness of the arm where it fits over the spindle appears to be 26mm on the spider side, and 25mm on the other.
Also, crazy question: would a sealed BB like this one be a viable option? The price is kind of crazy low: https://www.ebay.com/itm/New-Old-Sto...M/274455317335
Also, crazy question: would a sealed BB like this one be a viable option? The price is kind of crazy low: https://www.ebay.com/itm/New-Old-Sto...M/274455317335
02-11-21, 04:40 AM
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[/QUOTE]113mm[/QUOTE]
Thank you!
[/QUOTE]Absolutely. Can you find one 113mm?[/QUOTE]
hmmm...no, it seems that 115.5 is the only length they have it in. Oh well.
Thank you!
[/QUOTE]Absolutely. Can you find one 113mm?[/QUOTE]
hmmm...no, it seems that 115.5 is the only length they have it in. Oh well.
02-11-21, 04:47 AM
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With a single chainring, you just need to worry about chainline and clearance.
Will it be geared in the back or fixed/single?
Will it be geared in the back or fixed/single?
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1987 Crest Cannondale, 1987 Basso Gap, 1992 Rossin Performance EL, 1990ish Van Tuyl, 1985 Trek 670, 1982 AD SLE, 2003 Pinarello Surprise, 1990ish MBK Atlantique, 1987 Peugeot Competition, 1987 Nishiki Tri-A, 1981 Faggin, 1996 Cannondale M500, 1984 Mercian, 1982 AD SuperLeicht, 1985 Massi (model unknown), 1988 Daccordi Griffe , 1989 Fauxsin MTB, 1981 Ciocc Mockba, 1992 Bianchi Giro, 1977 Colnago Super
07-29-21, 08:58 AM
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Oh and Stronglight 93 uses 118 for a double. It depends on the design of the crank and the dimension of the center of the rings from the mounting of the taper to get the right chain line.
BB shell size contributes too, in some cases.
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