da Vinci triple crankset & BB tech questions
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da Vinci triple crankset & BB tech questions
I'm currently in the process of replacing our old Campy Record triple crankset (54/44/36) in favor of a da Vinci (52/39/30) due to the fact that our aging years are catching up to us. However, when I attempted to put on the new da Vinci set, I've noticed that our current spindle is far too long by perhaps 10mm to 15mm if not more. The BB shell is a standard 68mm, but I'm wondering if there are any others here who might be using essentially the same da Vinci set and if you'd happen to know what length of a spindle to use? As it is now, the front derailleur is unable to reach the middle and outer chainrings. Also, our current BB is a Phil Wood model from the 80s, so will I need to purchase a completely new BB and spindle? Since I haven't had much experience in the BB area, I'd appreciate any help. Thanks in advance!
Edit note: I might also add that da Vinci recommends a spindle range of 107mm to 113mm for the stoker, so I'm thinking that a 110mm might be about right. I do know, though, that without taking the crank back off the bike that the current spindle must be about 130mm or longer. It's quite a significant difference, to say the least. Thanks again!
Jim
Edit note: I might also add that da Vinci recommends a spindle range of 107mm to 113mm for the stoker, so I'm thinking that a 110mm might be about right. I do know, though, that without taking the crank back off the bike that the current spindle must be about 130mm or longer. It's quite a significant difference, to say the least. Thanks again!
Jim
Last edited by jim_pridx; 02-11-10 at 11:37 AM.
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I'd give DV a call. (The number is on their website). They are super nice and happy to help and seem to be endearingly geeky engineering types. Todd does not always respond quickly to email, so call.
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BTW - "endearingly geeky" is a great term! I like that!
Last edited by jim_pridx; 02-11-10 at 02:51 PM.
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You need to get new BBs because the da Vinci cranks require a different taper (JIS) than the Campy cranks. We use 113 front and back but could have gone narrower. 108 probably would have worked. What make tandem do you have?
Last edited by rmac; 02-11-10 at 06:11 PM.
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#6
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How come you have to switch out the entire crankset, couldn't you just get the chainrings in the size you want to fit on the Campy triple?
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Regarding the questions of others about chainring replacement on the Campy set, Chris hit is right on when he spoke of the old Campy BCD. The smallest possible chainring set for that crank is a 52/41/36, although, I've heard that smaller inner rings are around, but extremely rare.
Thanks again everyone!
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