"jim beam" <
[email protected]> wrote in message
news:1109305191.5380dec31fa839f2e5ed7bb7e8d2499c@teranews...
> David L. Johnson wrote:
> > On Wed, 23 Feb 2005 22:01:46 -0800, jim beam wrote:
> >
> >
> >>>>Is stiffer stronger?
> >>>
> >>>
> >>>In this context, yes.
> >>>
> >>
> >>i'd be careful with that statement. cookies are stiff, but
not very
> >>strong. stiffness & strength are different. stiffness is
the slope of
> >>the stress/strain line. strength is how long that line will
extend
> >>before it becomes non-linear. easily confusing.
> >
> >
> > Well, a thicker cookie would be stronger as well as stiffer.
Since we're
> > talking about the same materials for both box-section and
"aero" rims, I'd
> > be willing to bet that the v-shaped rim is both stiffer and
stronger.
>
> indeed.
>
> > Heavier, too, of course. But my Mavic v-shaped rims have
stayed round
> > over time much more reliably than the MA-2s (two of which
did not
> > even start out round).
>
> i have the same experience. propensity to flat spot &
rust-prone
> eyelets are no great advantage. open pro is much superior.
And more than twice the price, being that ModE/E2/MA2 was about
$20 street. Also, IMO, the MA2 was longer lived and less prone
to sidewall damage and spoke-hole cracking than the Open Pro, but
the Open Pro is a good rim, too. Most of my warm and fuzzy
feelings about the MA2 are based on my undergrad cottage industry
of building wheels on 120mm spaced hubs on ModE/E2s. I used
tensions that are impossible with 130mm hubs, and everything
seemed to stay true -- and they were all round out of the box for
me. I also used to tie and solder, and the "Bicycle Wheel" was
not in existence, so I did not do the magical squeeze, so I bet
all those wheels from almost 30 years ago have exploded! -- Jay
Beattie.
