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What if my chainline doesn't work?

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What if my chainline doesn't work?

Old 10-19-11, 07:54 AM
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hybridbkrdr
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What if my chainline doesn't work?

I have a Nashbar touring frame which has a 132.5mm rear dropout. I have a Sugino Impel 150x crankset and a Shimano Tiagra rear hub. Could this still work or would it be a mistake to use that rear hub?

The crankset: http://www.niagaracycle.com/product_...ucts_id=405881
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Old 10-19-11, 08:49 AM
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I don't understand your question. Or your question suggests you need to understand chainline better. Here's a link to Sheldon Brown's site page -- all about Chainline. Read it and your question may answer itself.

In general the center of the chainrings should line up with the center of the cassette so the chain has the least angle throughout the gear range. The ideal chainline is determined by the width of the cassette and the width of the rear dropouts as follows: half the dropout width minus half the cassette width minus about 2mm because the cassette is inboard of the right dropout.

Odds are you're crank will work if you use the specified spindle length.
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Old 10-19-11, 08:57 AM
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Originally Posted by hybridbkrdr View Post
I have a Nashbar touring frame which has a 132.5mm rear dropout. I have a Sugino Impel 150x crankset and a Shimano Tiagra rear hub. Could this still work or would it be a mistake to use that rear hub?
You shouldn't be worrying about hub choice WRT chainline. If it's a prebuilt wheel and the outer cog seems to close to the frame you might want to remove the cogset and see if there's a spacer behind it I suppose, but other than that...

The main concern chainline-wise centers around crankset and BB interaction.

EDIT: interesting that the catalog page for the crankset says 110/113 mm BB. This may not apply to your cranks but I tried my old Sugino 700 cranks on a 113mm UN54 and it was a tad too far outboard. A 110mm UN54 worked great, however.

Last edited by LesterOfPuppets; 10-19-11 at 09:03 AM.
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Old 10-19-11, 11:57 AM
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derailleur and multiple chainring/cog sets , it matters less
than having a single chairing/cog on each end.

Outboard favors higher gears, if inboard, lower gears, line up better.
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