Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
John has a better memory than I do.
First, I find the bow in the tube so I can point it along the plane of the bike. If nothing else, this helps when the customer gets out his finely calibrated string when he's trying to blame the frame alignment for his wonky wheel dish problems. Then I mark the centerline along the bowed dimension using marking fluid and a scribe. You can do it with just the scribe, but it's a lot easier to see with the marking fluid there.