John Morgan wrote:
(WAS: Time to build some new wheels - opinions sought)


The bottom bracket argument isn't much of anything, since bottom brackets
only cost around $30 anyway.

It's not about merely the BB. So, let's say tomorrow, I bust my XT
crank arm. *Right now*, I can probably find an XT Octalink crankarm
or crankset to replace it. In three years? In five years? I'll bet
that ISIS will still be going strong then. Not only do they have a
new crankset standard, but they have been carrying 3 *other* BB types:
V2 Octalink, V1 Octalink, and square taper. I'm going to pick up 4
extra Octalink BBs (two for each bike) and when they are done, the
cranks will be replaced with some non-Shimano stuff.

BTW, did you see the new Saint gruppo, and how the RD is attached?
Different standard...


Usually you decide what kind of cranks you
want and then buy the bottom bracket to match...

Yup, I have Octalink XTs on right now - both bikes. They are nice,
and were relatively inexpensive for their quality. In three years,
how many new Octalink XT cranksets do you think I might be able to
buy?


by using the new external
bearing setup, they save you the trouble of buying a bottom bracket
separately.

As you say, a $30 BB is not an issue. As I was shopping for hubs the
other day, I asked my not-so-LBS about XT ISO disk hubs. One of his
catalogs doesn't even have the M756s any more. Hmmmm. How long
before they stop production on Octalink BBs? (Thus rendering my
expensive XT cranksets useless upon BB failure.)

Shimano is doing it's best to make the old gear obsolete, such that if
you break one thing some time in the future, you'll be obligated to
buy a whole bunch of stuff to replace perfectly fucntional, but
now-obsolete, ancillary gear. I very much object to throwing away
(giving away, selling for some miniscule price) perfectly usable bike
gear. Standard ISO hubs, conventionally-return-sprung RDs, ISIS
BB/cranksets, separate brake and shifter controls. I hope bike
consumers also see what I see, so that they might choose their poison
with open eyes, whether that be poison dished out by the Big S, or
some other poison.


Jonesy, I think you're looking at this problem from the wrong angle.
Technology always advances, leaving older products obsolete. This is true
in any industry, and shouldn't be viewed so negatively. If every
generation of gear was compatible with the previous, there would be very
little improvement.

You gave the perfect example of this. You enjoy the benefits Octalink has
over standard square taper. If I apply your sweeping judgment, Shimano
should have stuck with square taper because it is compatible with cranks
that have been made for decades. The splined bottom bracket is a superior
technology that is not compatible with anything previously made, but at
some point we must let go of our obsolete cranks and accept the new
standard. To do so bitterly would be a shame indeed.


For every splined bottom bracket there are 5 Shimano "innovations" that
were profit advances rather than technological advances.

Greg

--
Destroy your safe and happy lives
Before it is too late
The battles we fought were long and hard
Just not to be consumed by rock'n'roll