Here's a mechanical puzzler for those so inclined. Today I was doing a tune-up on a Raleigh Super Course, probably a late 60s or early 70s model, definitely before 1973. The tag specifically said to true the rear wheel well. It had some very loose spokes (luckily loose in the right direction) so I started truing. Then I noticed that the hub had play, so I removed the freewheel (a very odd 3-prong freewheel made in England that I'd never seen before, though our shop had the proper tool to remove it) to adjust the hub. The hub had quite a bit of play, but was also binding in spots. I adjusted it as well as I could and started truing again. The wheel was impossible to true. I'd spin the wheel in one direction, find where the rim hit the truing stand caliper, spin it the other way, and that spot missed the caliper by 3 mm. What was wrong with the hub? I'll let you all guess the usual things first, then I'll tell you what it's not and give a couple more clues. This is such an odd one that I may have to give out a prize if someone guesses correctly.

