The 1989 TT was short (15 miles), wind at his back most of the course. 300 foot loss in altitude. LeMond's time was not that spectacular, he only beat Thierry Marie by 33 seconds that day, and Thierry was not even using areo bars
A far more example of a questionable TT performance would be Armstrong's TT that was over twice as long, over multiple climbs, yet averaged only .5kph slower.
A far more example of a questionable TT performance would be Armstrong's TT that was over twice as long, over multiple climbs, yet averaged only .5kph slower.