That is a myth. Material alone doesn't determine this, and modern road bikes are on 28mm tires at ~70psi so this isn't nearly as much of an issue as it was 20 years ago (and it wasn't a real issue then either)
A myth? Your butt can tell you immediately that it is not a myth. All other things being equal, a steel frame will feel less harsh than an aluminum or carbon bike.
whalesalad|2 years ago