crank and chainline question
So I was just able to pick up a used dura ace 7600 crank and a dura ace 47t chainring off ebay for way less than I should have paid. (yay) I am now wondering what bottom bracket I'm gonna need to get my chainline prefect on my mark v. Right now I'm using some stock hubs with a 42 mm chainline but within the next month or so I'm building up some paul hubs which have a 44 mm chanline. I'm wondering if I can get an adjustable bb or if I should just swap out bbs when I change wheelsets. I plan to use my stock wheelset in the winter is why this is an issue. I'm still pretty new to all this and I suppose 2mm might not even make a difference at all in functionality. Any help would be appreciated, thanks in advance.
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Do NOT buy an adjustable BB.
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Originally Posted by operator
(Post 8770030)
Do NOT buy an adjustable BB.
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Originally Posted by amor fati
(Post 8770527)
What? Why not? To deal with those Paul hubs appropriately it seems like he's gonna have to.
Alternatively, the OP can get a symmetrical spindle that's 4mm longer than whatever is paired with the crank in question. |
Originally Posted by amor fati
(Post 8770527)
What? Why not? To deal with those Paul hubs appropriately it seems like he's gonna have to.
Bottom line is, don't buy it unless you *really*, *really* need to. |
yea if the chainline is 42 now, and you'll be moving on to 44, it's no big deal.
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So if I go with a 109mm bb it looks like I'll have a 43mm chainline. So either way I go I won't have a perfect chainline, but will always being 1mm off make any real difference in performance or chain noise?
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No
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anyone have a picture of a bad chainline?
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Originally Posted by ddac
(Post 8777141)
Picture of bad chainline: http://farm4.static.flickr.com/3449/...82b437a2_o.jpg
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Originally Posted by muckymucky
(Post 8782416)
is there specific in this picture you linked that says this is a bad chainline?
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What kind of crank is that, and what kind of bottom bracket? BBs come in all sorts of spindle widths. All you'd need to do would be to get the same BB with a shorter spindle.
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Originally Posted by queerpunk
(Post 8784279)
What kind of crank is that, and what kind of bottom bracket? BBs come in all sorts of spindle widths. All you'd need to do would be to get the same BB with a shorter spindle.
But then again the rear wheel might be 47mm... |
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