Patrick, I have to agree with what Jim Bronson kindly suggests/advises. My wife and I ride tandem. Late last year I built up a set of wheels with new rims (Velocity Dyads). We were on a night ride with our local cycling club. We were headed downhill on a decent hill and struck a very large dip in the road which I, as the Captain, did not see (my bad). It was quite severe and jolted the heck out of us. We have a good headlight too. We immediately had a pinch flat on the front and I was able to fortunately keep us up and stop in a calm manner. Whew! Caught our breaths and fixed the flat and got going.
I took both wheels off to check. I found a very large bulge on the front rim (36 hole). I took the tube and tire off and checked the spokes. All the spokes were amazingly intact. The rim took the brunt of the force absorbing most of the energy. The rear wheel was not nearly as bad (which is interesting) with a much less pronounced bulge. The rear is 40 hole, but most of our weight was on it. BUT, I have in the garage two (2) brand new Velocity Dyad rims, ready to be re-laced up. Maybe reconsider eventual replacement of parts that take normal wear and tear. Enough said. Best regards, Jeff On Wednesday, February 28, 2018 at 12:32:51 PM UTC-8, Jim Bronson wrote: > > Rivendells are great bikes and the owners are usually experienced > cyclists, which has me all the more scratching my head about this thread. > > You'd be better off not ignoring signs of impending rim failure, like an > obvious and severe rim braking surface crack, than making any sort of moral > equivocation about what brake types are best for safety. > > I'm sorry, but riding this for 1000 miles was not a good idea. If it were > me, the first time I noticed it, I would have nursed the bike home and > immediately replaced it. > > I replaced one of my back rims a while ago for some barely noticeable > surface cracks, and another one more recently when the eyelets started > pulling through. There's no way I would have ridden with the damage that > you depict in your picture. > > Does anyone remember "ABC Quick Check every time you ride"? It's a good > idea. > > On Wed, Feb 28, 2018 at 8:33 AM, Patrick Cronin <patrick...@gmail.com > <javascript:>> wrote: > >> >> After riding a bulging 40-spoke Velocity Dyad rim on my Hunqapillar for >> too long it finally cracked. The only way I knew about the bulge is because >> once per rotation the wheel rubbed *both* brake pads. The wheel was >> never out of true, so I kept riding it ~1000 miles. I decided to rebuild >> the wheel only because I hit a sand/salt patch on the road, skidded about >> ten feet when the rim hit the brake pads and I nearly went down. Most >> notable is that I never flatted, as in not once since this wheel was built >> in 2011. I'm curious if I would have known about the issue had I been >> running disc brakes. That got me thinking more: I wonder if rim brakes are >> safer for this reason. Had I been running discs I likely would have had a >> catastrophic rim failure because, other than cosmetic, there would have >> been no indication of a problem. Thoughts? >> >> >> -Patrick >> >> >> >> >> >> <https://lh3.googleusercontent.com/-7YsTmvCvYnY/Wpay8RfsJeI/AAAAAAAAsrY/azDpm_9nqTgfXd0uBXN694VubKvvY9K9wCLcBGAs/s1600/IMG_0002.jpg> >> >> -- >> 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. >> > > > > -- > ------------------------------------------------------------------ > signature goes here > -- 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.
