John Thompson wrote:
> The first couple runs of 753 frames we did at Trek used what we
> called the "frame saver" crown -- an Ishiwata SCM crown with
> material milled out between the steer tube and blades. Before
> modification, the SCM looked sort of like the Cinelli MC
>
> After modification it looked like this:
>
> http://www.os2.dhs.org/
>
> It was much easier and cheaper to replace a customer's 753 fork
> than to replace the frame.
>
> Later runs were changed to a Tange crown that wasn't as
> malleable:
>
http://www.vintage-trek.com/
>
> I'm not sure why the change was made.
I'll speculate the change was made for stylistic, aesthetic reasons mainly. That later crown looks like a T.S. Isaac design to me. The Ishi crown looks a bit awkward to my eye, though I don't doubt it did its job of bending in a crash.
Mark Bulgier
Seattle WA USA