Toshi, That's my understanding as well, it has to be thicker tubing walls for structural strength.
Perhaps the inconvenience of a different seat post diameter was the trade off to avoid frame warranty claims. In this case the slight inconvenience was shifted to the consumer. At the end of the day I suppose it's a small price to pay for Riv to remain viable. Hugh On Mon, Oct 18, 2021, 11:04 PM Toshi Takeuchi <tto...@gmail.com> wrote: > Yes my understanding is that if you want a thicker tube for strength, the > outer diameter stays the same—I suppose so you can use the same lugs, but > that means the inner diameter has to decrease, so you have a smaller seat > tube diameter. > > Toshi in Oakland > > On Mon, Oct 18, 2021 at 8:35 PM Hugh Smitham <hughsmit...@gmail.com> > wrote: > >> Hey Fellas, >> >> Thanks for the reply's. >> >> Ron, honestly I know very little about bicycle frame manufacturing in >> terms of the decisions that go into ordering a batch of F&F.'s. I could >> certainly see creating a uniformity of parts and I'm sure Grant has some >> rationalization for going with this diameter seat tube but it effectively >> limited choices, virtually every seat post manufacturer makes a 27.2 mm >> post. >> >> Karl, it does. >> >> Joe, they do but I prefer a dual bolt post. They are stronger and allow >> for better adjustment. >> >> A friend of mine on the list here uses a suspension post, When Rivendell >> went to this seat post diameter it effectively limited him from buying any >> of the new frames because nobody makes his preferred suspension post in >> that diameter only in 27.2mm. >> >> Perhaps I'll call Grant and ask the man himself why he made that >> decision. Somewhere I read that he wanted to create a thicker tube wall for >> more strength? Maybe there were some failures and he was future proofing? >> Maybe someone with better knowledge will chime in? >> >> Hugh n LA >> >> On Monday, October 18, 2021 at 8:00:52 PM UTC-7 Joe Bernard wrote: >> >>> I don't know the answer but I do know Riv also carries the S65 >>> single-bolt in 250mm for $84. >>> >>> Joe Bernard >>> >>> On Monday, October 18, 2021 at 7:01:38 PM UTC-7 Hugh Smitham wrote: >>> >>>> Maybe someone can answer this, why in the heck did Rivendell start >>>> making the seat tube inside diameter 26.8mm on the new bikes? I believe >>>> hearing something about seat tube wall thickness. Don't get me wrong, I >>>> think the new Geos make for a better ride, but it's way easier to find >>>> posts in 27.2mm all day long. >>>> >>>> Rivendell has the Nitto S83 in that diameter but it's a whopping 300 mm >>>> length 50 mm more than I need and also a whopping $128 before tax and >>>> shipping. >>>> >>>> Rant over n out. >>>> >>>> Hugh n LA >>>> >>>> >>>> -- >> 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 view this discussion on the web visit >> https://groups.google.com/d/msgid/rbw-owners-bunch/91a0f9c7-392b-40bb-a080-f9dfa767001fn%40googlegroups.com >> <https://groups.google.com/d/msgid/rbw-owners-bunch/91a0f9c7-392b-40bb-a080-f9dfa767001fn%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- > You received this message because you are subscribed to a topic in the > Google Groups "RBW Owners Bunch" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/rbw-owners-bunch/PJBZce5BzpY/unsubscribe > . > To unsubscribe from this group and all its topics, send an email to > rbw-owners-bunch+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/rbw-owners-bunch/CAGB59xyCMJEqFqzUwwKwx6Shs914u3AMjDQ%2BXG8YLSXHqbKDeg%40mail.gmail.com > <https://groups.google.com/d/msgid/rbw-owners-bunch/CAGB59xyCMJEqFqzUwwKwx6Shs914u3AMjDQ%2BXG8YLSXHqbKDeg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/CA%2BvJTt3R94KPyO9Z%2BEWQ7P-JHWQ%3DKWerzxR6vDRLTWX%2B09_GTg%40mail.gmail.com.
