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Frames can be off a little here n there and so can things mounted in isolastics. But none of it matters too much if the important points are all in line.Getting the front wheel centered in the forks is always gonna be the best starting point. Until you do that, you have no datum to work from. I can’t see how it couldn’t be the correct centre line (unless the frame is scrap).Ignoring this datum and simply building the rear wheel offset around what looks right compared to some random frame tubes, and then working from there, is wrong IMO.
Frames can be off a little here n there and so can things mounted in isolastics. But none of it matters too much if the important points are all in line.
Getting the front wheel centered in the forks is always gonna be the best starting point. Until you do that, you have no datum to work from. I can’t see how it couldn’t be the correct centre line (unless the frame is scrap).
Ignoring this datum and simply building the rear wheel offset around what looks right compared to some random frame tubes, and then working from there, is wrong IMO.
