Chainline setup - is it really as simple as...
07-03-13 | 07:44 AM
#1
Thread Starter
I never finish anyth
Joined: Jul 2010
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From: Western KY
Bikes: 2008 Merckx LXM, 2003 Giant XTC mtb, 2001 Lemond Alpe d'Huez, 1997 Lemond Zurich, 1989 Cannondale ST, 1988 Masi Nuovo Strada, 1983 Pinarello Turismo
Chainline setup - is it really as simple as...
The crankset I want to use on a project bike is supposed to give a 45mm chainline with a 103mm BB. The IGH rear hub (130mm OLN) gives a 50mm chainline. Basically, I need to move the chainring out 5mm.
Is it really as simple as buying a 113mm BB? From some of the other threads I've read this just seems to be too simple.
But, maybe it really is.
I thought that I read some BB are not symmetrical, but I cannot find that information now that I need it. If a 113mm BB is symmetrical, then I think that's all I need to find and the chainline should be just right.
Is it really as simple as buying a 113mm BB? From some of the other threads I've read this just seems to be too simple.
But, maybe it really is.
I thought that I read some BB are not symmetrical, but I cannot find that information now that I need it. If a 113mm BB is symmetrical, then I think that's all I need to find and the chainline should be just right.
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Dale, NL4T
Dale, NL4T
07-03-13 | 08:41 AM
#3
Keepin it Wheel
Joined: Aug 2011
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From: San Diego
Bikes: Surly CrossCheck, Krampus
Yes, you remembered to double your desired delta because it will be for both sides. Although it makes more sense to me if every BB had the same width out the left and all the variability went out to the drive side. But I guess that would mess up Q-factors.
07-03-13 | 09:41 AM
#4
Senior Member
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From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
as the others have noted, 10mm does the trick as long as it's another 5mm on both sides.
That's really the key, 5mm (or close to that, since 1-2mm off is OK) more on the right.
That's really the key, 5mm (or close to that, since 1-2mm off is OK) more on the right.
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FB
Chain-L site
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
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