Originally Posted by
Jeff Neese
That's the single most important measurement on your bicycle. Do you know what it's supposed to be? You always go by that, not the distance to your chainstays or anything else. Chainline is everything.
I live where it's quite flat and tend to do 90% of my riding in a couple gear combinations. I try to set up the drivetrain so that I have an optimal chainline in those gears. To me that makes more sense than going by what's dictated in a manual, although in practice I doubt I am very far from spec.
I am intrigued though by your statement that chainline is the most important measurement on the bike. Can you elaborate? Are you including fit measurements?