Originally Posted by
John E
Jobst Brandt's opinion (my bolding of the text):
> Internally lugged (aka sloping fork crown) forks fail
more often than ones with external lugs because the transition inside
the blade of the crown extension cannot be feathered, leaving a sharp
discontinuity.
This makes just about zero sense to me. Internally lugged forks are
harder to braze because the heavy part of the crown is inside the light
fork blades. So some people probably fail to get good penetration, and
others overheat the fork blade tubing. But mechanically, the internal
crowns are probably stronger. I see no reason an abrupt
change in section would cause a problem given that all fork blades
I've ever seen were plenty thick enough.
Seems unlikely that the op has broken the fork crown at the place
where the crown meets the blade. You are not going to break a
good braze. The tubing would buckle first.
Problem is, there is no profit for anyone to fix this. I wouldn't. Even
framebuilders do not have a fixture that would be suitable. Bike shops
sometimes have the Park fork jack that will unbend a fork, but it puts
lots of stress on the frame too.