This is all so much to think about.... thank you everyone. I'm particularly appreciative of the run down on gearing. You're right, this is something the could determine crank choice, and so is something I should think about a little more deeply before pulling the trigger.
I really wish I could remember where I read that bit about aluminum weakening over age. I feel like it had to be a RR issue somewhere in the mid-20s. Regardless, sounds like it's not something to fret over. But it also sounds like going vintage would contradict my desire for a 11sp STI drivetrain. Unless, that is, I was to swap out the rings it came with. I've never heard of the High Sierra cranks. They look great. Thanks for the link. Sounds like the WI VBC might be the way to go should I find myself able to deal with the black rings. On Thursday, October 25, 2018 at 6:28:50 PM UTC-4, Patrick Moore wrote: > > That indeed would be the theoretical reason; not age. Good point. > > Next question: is there any useful and accurate *practical* guidance -- > rules of thumb -- for retiring aluminum cranks, seatposts, bars, stems, and > so forth? > > Bills' reply reminds me of Grant's long-ago and wonderful metaphor: > "Dolphin-like thighs" -- in contrast to sylph-like arms. > > Patrick Moore, who very strangely didn't think for a minute about the > danger of riding his (What? I myself have owned them at least 15 years, and > I got them ... 2nd hand? 3d hand? 4th or 5th hand? Pro 5 Vis cranks) during > this afternoon's very pleasant fall ride. > > On Thu, Oct 25, 2018 at 1:48 PM Bill Lindsay <tape...@gmail.com > <javascript:>> wrote: > >> Somebody claimed to have read somewhere that aluminum weakens over time. >> >> Patrick Moore asked for more details, and sounds skeptical. >> >> I took my materials science classes a fairly long time ago, but you are >> right to be skeptical, Patrick Moore. Aluminum most certainly does NOT >> change material properties with just time. Aluminum does weaken with USE >> (repeated cyclical loading). You do not need to throw away your 20 year >> old cranks just because they are old. You have to throw them away because >> you ride an ENORMOUS number of miles and apply MASSIVE torque to them. >> >> Bill Lindsay >> El Cerrito, CA >> >> On Thursday, October 25, 2018 at 12:07:57 PM UTC-7, Patrick Moore wrote: >>> >>> "Also, I read some somewhere(maybe a Riv Reader) that metals, and >>> aluminum in particular, weaken significantly with age." >>> >>> I'd like to see the article and review the evidence. I myself have heard >>> nothing said about age as such making metals generally, or aluminum in >>> particular, less strong. Repeated bending, corrosion, yes, but not age >>> alone. Anyone? >>> >>> Come to think of it, Jan in all his riding of vintage machines from 40s >>> and 50s has said nothing about their period cranks being dangerous. >>> >>> Patrick Moore, who rides old aluminum cranks (and very old aluminum >>> cranks! 8 sp Logic, 5 sp Pro 5 Vis, Viscount/Lambert -- the one with the >>> tapered socket) and doesn't want to switch. >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "RBW Owners Bunch" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to rbw-owners-bun...@googlegroups.com <javascript:>. >> To post to this group, send email to rbw-owne...@googlegroups.com >> <javascript:>. >> Visit this group at https://groups.google.com/group/rbw-owners-bunch. >> For more options, visit https://groups.google.com/d/optout. >> > > > -- > Resumes, LinkedIn profiles, bios, and letters that get interviews. > By-the-hour resume and LinkedIn coaching. > Other professional writing services. > http://www.resumespecialties.com/ > Patrick Moore > Alburquerque, New Mexico, Etats Unis d'Amerique > ************************************************************************** > ************** > *Auditis an me ludit amabilis insania?* > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
