>>1132847Pantani set the fastest time up Alpe d'Huez (most iconic climb in the Tour de France) in 1998. His Bianchi was modern with a threadless stem & alluminium frame and only 6.9kg weight, 100 grams over the 6.8kg UCI weight limit that is still in place today. It did have oldschool gearing though, 54-44 crank.
Armstrong era, late 90s- 2000s is probably overall the fastest.
Miguel Indurain was the last one to win the tour on a steel bike 1991-1995.