Originally Posted by
Road Fan
It may have to do with construction, but I'm sure it has something to do with materials. Steels with less strength (1020 or other lower-carbon steels) have more ductility, i.e. they can be bent into different shapes more times before they start to fatigue. With a UO-8 or Raleigh Grand Prix, I suspect you can make corrections that would not be advisable with stainless 953 or some other modern super-alloys.
Exactly
If your legs bent more than the crown the material is butter and could be adjusted with no worries. I don't push a bent crown around too much.