I put my '87 Ironman firmly in my benchtop stand, shifted to 12th gear, carefully gripped the seat stay, and hand-pedaled like crazy.
Then, I started my stopwatch to see how long the wheel would spin.
In both trials the time was about 2 minutes, 15 seconds.
(I have a significant hub wobble, likely decreasing my time.)
It's kind of a goofy bench test, but I had nothing better to do!
Like a KOM challenge, I'm certain someone will top this oddball record.
