Low-rider mid-fork Boss location?
 

I tried searching, can't figure it out. Suggestions for heigh of a through-boss for lowriders, from top-of-fork crown ____ mm??

The best thing to do is to use the rack itself to determine where the boss should go. At Trek we made a fixture for it, with the bosses located to use a Blackburn low-rider rack, but that's mass production for you. For a one-off project, nothing beats having the actual equipment at hand.

thanks for the reply. This isn't nearly one-off, though, and I don't know what racks people will want to use. I made some measurements and settled around 150mm right-angle distance from center-of-axle...

The standard is 165 mm between the (rear) eyelet on the dropout and the mid-fork braze-on. That's what Tubus and others use.

thanks for your tip. Like your blog, by the way.
that's real close to where mine ended up, but not close enough, I'm afraid. Key question is: you're talking right-angle distance, right? Otherwise fork rake.....

PS: I got my measurement by taking a tape measure to a specialized dealer....