It is good to know or sweet to think that so many here are regularly putting
out 500w in sprint bursts in friendly club rides or standing and mashing
600-1200 reps on long climbs. <smile> Stressing those Strada cranks. Wish
I'd worked harder this winter to keep up.
>From numerous exchanges others had with Jobst Brandt in bikes.rec.tech: In
spite of interest in "stress risers" from the thinned web of material
joining spiders and crank arms, photos are available of fractures elsewhere,
especially at the pedal. The industry should never have abandon washers
there. Brandt himself reported breaking more than one crankset.
Seriously, one needs to keep in mind how much or more likely how little one stresses the equipment. I'd be pleased to be able to sprint on level ground to time-trial cruising speed of pros, even if that meant I'd have to give up or more frequently inspect gear for flaws.
I have a '73 Campy SR crankset in which the crudeness of milling of all the flutes reminds you that QC was not always that great. So, I set to grinding and then polishing out the swirls.
Harry Travis New Jersey, USA
On Wed, Apr 7, 2010 at 8:16 PM, John Thompson <johndthompson@gmail.com>wrote:
> Kurt Sperry wrote:
>
> > I was always amazed people were able to abrade through the very hard
> > anodized oxide layer with leather toestraps.
>
> I don't think it's the leather that's abrading the finish, but rather
> grit stuck to the leather. Plenty of silica on most roads, at least.
>
> --
>
> -John Thompson (john@os2.dhs.org)
> Appleton WI USA
> _______________________________________________
>
--
Harry Travis