There's an idea worth considering.  My 24t granny is steel.  When you
think about it, neither the granny nor the Really Big Cog see a lot of
use, so maybe an aluminum 34 would do.

I see a lot of people wearing out middle rings because they're over-
geared & don't use the big one.  My Atlantis came with a Riv standard
Sugino 24-36-46.  The middle & big wore out together at around 20-25k
miles of mostly dry riding.

dougP

On Aug 11, 3:31 pm, ted <[email protected]> wrote:
> I have heard or read that wear is more of a problem with fewer teeth
> and that that was why chainrings are usually al and cogs are usually
> steel. That seemed pretty plausible when the small ring was 39 or 42
> and the big cog was 21 or 25. When small rings are 24 or 26 and the
> big cog is 32 or 34 or even 36, well not so much. Does it make sense
> to use steel for sub 30t chainrings, or al for big (like maybe >28t)
> cogs?
>
> On Aug 11, 1:03 pm, Bertin753 <[email protected]> wrote:
>
>
>
> > Regarding steel vs aluminium: I've 11000+ miles on a 46t TA Pro 5 Vis 
> > chainring with no wear that I can see. Pavement, dry, but dusty.
>
> > Patrick Moore
> > iPhone
>
> > On Aug 11, 2012, at 11:49 AM, charlie <[email protected]> wrote:
>
> > > Just ordered stainless steel chain rings so I'm working on the switch 
> > > from aluminum to steel where possible.
>
> > > On Saturday, August 11, 2012 10:29:54 AM UTC-7, Patrick Moore wrote:
> > >http://www.classiclightweights.co.uk/bikes/ferris-clarke-rb.html
>
> > > This setup is pretty nice, tho' I'd prefer a 17 in place of the 16.
>
> > > --
> > > "When in Rome, do as they done in Milledgeville."
>
> > > Flannery O'Connor
>
> > > -------------------------
> > > Patrick Moore, Albuquerque, NM, USA
> > > For professional resumes, contact Patrick Moore, ACRW
> > >http://resumespecialties.com/index.html
> > > -------------------------
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