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: 36 Post(s)
Tagged: 1 Thread(s)
Quoted: 1415 Post(s)
As the others have pointed out it's about chainring alignment with the rear sprocket, not chainstay clearance (unless there isn't any). An easy way to confirm good chainline is to lay a straightedge (or anything both straight and long enough, like a length of dowel rod) along the outside of the chainring on a secant and carrying it back to the rear sprocket. Ideally it should line up the same way, but anything within a few millimeters is fine.
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