Watching the Diamond League athletics one can reflect on the world records many of which have stood for many years e.g 1500m, 800m. Athletics has a standard set of distances so athletes can be compared to their counterparts of years ago. The only event which has seen consistent big improvements is the marathon due to shoe technology. Hicham El Guerrouj from 2004 is still better than today's 1500m runners.
Pro road cycling does not have a standard set to compare generations - but I keep reading that the "numbers" improve every year e.g Pogi Jonas 24 were measurably better than 23. that Roglic's "numbers" are much better than when he nearly won the Tour, that the "numbers" today are way better than Froome or Contador could produce.
So what's going on in cycling? No doubt legal technology is always improving - but enough to account for such improvements? Surely today's riders are motor/chemical doping off the charts - or is something else going on?
Everything in cycling has changed.. Rider height, weight, clothing, frame and wheel design. Training, nutrition, cross training, tactics, rider position. Tire pressure, size, materials, bearing surfaces, frame materials.. And many of those things cross over to many sports including running..yes something else is going on.. Science!! And many old school racers are saying it often and out loud, too much data, not enough heart, instinct and lack of race days..