So I've got my Klein built now and I want to add a rack. I order & receive a nice Tubus, go to put it on, and SURPRISE - the bolts don't fit!
There are tapped ears at the rear dropouts for a rack and a fender. The holes are threaded, but no bolts came with the bike. 5 mm bolts are too large & won't go into the holes. 4 mm bolts are too small and just rattle around in there. SAE bolts seem to be the right size, but the thread is wrong - I get the bolts in about half a turn and the threads bind.
Same situation with the front fork - the fork is tapped (inside and outside the fork blade). The holes are too large for 5 mm bolts, too small for 6 mm, and threaded wrong for SAE.
WHAT KIND OF GOOFY BOLTS DOES THIS KLEIN NEED?
I doubt that they'd have used English threads, so I suspect that it is some alternate SAE threading. The local bike shop didn't have anything to fit, nor did the local hardware store. I could tap the holes for the next size up in metric, but I worry about creating stress cracking in the aluminum. I'd really like to have bolts that fit the original Klein threads.