Join Date: Apr 2009
Location: 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
Mentioned: 29 Post(s)
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If you have the sprocket and hub already it's easy to predict where the chainline will needs to be set.
Spin the sprocket onto the hub up to the shoulder, but don't bother tightening it. Now measure from the right lock nut face, to the center of a tooth (parallel to the axle), subtract that from the axle locknut width, which should be either 110 or 120mm, and that's the center to sprocket distance, or chainline. Your crank chainline should be set as close to that as possible, or within 1-3mm to either side.
An ounce of diagnosis is worth a pound of cure.
“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
“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