Re: 2008 2-piece Tiagra crankset

On Mon, 17 Dec 2007 13:09:33 -0800 (PST), Ozark Bicycle
<bicycleatelier@xxxxxxxxxxxxxxxxxxxxxxx> may have said:

On Dec 17, 12:59 pm, M-gineering <ikmotgeens...@xxxxxxxxxxxxxx> wrote:

Before the advent of marketing square taper axles were troublefree too ;)


And how long before Shimano "walks away" from this current design and
introduces something !!NEW!! ?

Marketing never sleeps.......

Well, let's see. All of the principal competitors have their own
hollowtech-alike product, and some of the frame makers are going over
to proprietary or unprotected-spec oversize BB designs. At the
moment, there are more potentially incompatible flavors of BB vs crank
vs frame than has been the case for a while. The need for a wider BB
shell on the frames is probably going to spawn yet another round of
revisions, but I've seen no sign from Shimano of a move in that
direction, and SRAM doesn't appear to have convinced anyone to grab
the ISIS-II spec and run with it, either. So right now we're trapped
in a twisty little maze of standards, all different.

Thus the question devolves to one of "what can be done to convince the
buying public that what's available isn't good enough?" The answer to
this, in my opinion, lies in Shimano and the rest getting
bargain-basement versions of the inherently fragile current tech into
the fray. When *those* arrive, with the problems they will inherit
from corners cut too closely in choice of materials and employment of
manufacturing techniques, we should start to see enough failures in
low-time components. My bet is that the outboard-mounted bearings
will loosen and/or fail more often when they're made more cheaply and
are mounted in less carefully-constructed BB shells, and this will
provide the stepping stone to redefinition of the standard BB shell
size. If a new genuine industry standard can be agreed upon (fat
chance), we're probably looking at a long period of sharp dichotomy
between old and new BB design support; I'm expecting any new BB shell
spec to be enough wider than 73mm to preclude using old BBs via a pair
of adapter rings. I would not be surprised if the new spec was 85mm
wide or more.



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