Now all we need is a way to get that 26.8 post to the USA. I tried cuz I know someonw who could really use this post but no go. Why doesn't Velo Orange sell it here??
On Friday, April 14, 2023 at 6:17:25 AM UTC-7 John Johnson wrote: > Hi Eric, > > Here in France you can get the Velo-orange UNO SP-248 (which appears to > be the Grand Cru and is also somehow maybe a Kalloy UNO - I dunno) for 30 > euros and it also somehow comes in 26.8 and has 30mm of setback. > > > https://www.alltricks.fr/F-11946-tiges-de-selles/P-2078692-tige_de_selle_veloorange_uno_sp_248_argent?gclid=CjwKCAjw8-OhBhB5EiwADyoY1WPUte5QqJuDCpSqsC1ylroPWaRLl1o-PcTGUhPWyfbwe17K8Mfn6BoCXrYQAvD_BwE > > cheers, > > john > > > > > On Friday, April 14, 2023 at 2:45:51 PM UTC+2 lconley wrote: > >> Note that tubing is almost as strong as solid. Removing the material from >> the center of a solid rod does little to reduce it's strength. The formula >> to determine the strength includes the distance (maybe squared) from the >> center of mass of the shape, so material at the center of mass of a circle >> (which is the center of the circle) contributes almost nothing to the >> strength - this is why bicycles are made of tubing and not solid rod. This >> is also why I will remove the material from the inside of the seat tube, >> but not from the outside of the seat post to make a 27.2 seat post fit a >> 26.8 seat tube (also the Nitto S-84 lugged seat post is plated on the >> outside). The exception to this would be to make an alloy Nitto stem fit a >> French steerer tube - a sanded down Nitto stem is still way, way stronger >> than an original French stem. >> >> Note that there have been many models of Brooks saddles that use double >> rails on each side and even some with triple rails - single rails are >> highly stressed. >> Probably the reason that the double rail Brooks B-72s were popular with >> the early mountain bikers >> [image: B72side s.jpg] >> Triple Rail brooks saddle, I think it was a B-33 >> [image: 144 (2).JPG] >> >> Laing >> Trying to remember the course "Strength of Materials" that I took 40 >> years ago and owner of many Brooks B-68s and 1 B-72 >> >> On Friday, April 14, 2023 at 8:14:23 AM UTC-4 [email protected] wrote: >> >>> A clarification: >>> >>> All the metal rails on all the Selle An-Atomicas are steel. The >>> difference between the T/X/H1 and T/X/H2 leather saddles is that the _1 >>> saddles are unitary, with the steel cantles/nose pieces riveted to the >>> leather tops. The rails on the _1 series saddles are 4130 steel rod. >>> >>> The _2 series saddles are modular, with the leather tops attached to the >>> cast aluminum cantle/nose piece with Chicago screws. The idea is that you >>> can replace subassemblies (top, frame, rails etc) on your own, without >>> sending the entire saddle to San Diego to replace a worn/failed element >>> (stretched tops are the most common, but bent rails used to happen a lot; >>> I've got at least four old SA-As with bent solid rails, from back when the >>> rails were much longer and they used a softer steel).The rails on the _2 >>> series detach from the cantle and nose pieces; there is an upgrade option >>> to carbon rails, for weight weenies. >>> >>> What I recently learned, although I must have read it in the description >>> when I bought it and immediately forgotten about it, is that the standard >>> steel rails in the _2 series are stainless steel *tubing*, not solid >>> rods. They way I found this out was when the rail on the H2 on my Trek 720 >>> (saddle purchased new, bike first built up in March 2021, ridden daily >>> since) snapped through last December. A weight savings, sure; but at what >>> price? I haven't called up SA-A to yell at them about it yet, but that's >>> definitely going to happen. >>> >>> In my case, the break was at a relatively low-stress point, between the >>> clamps on an old-fashioned Campy Nuovo Record two-bolt seatpost. >>> >>> As for rail length, it may depend on the age of the saddles you're >>> comparing. SA-A has definitely been shortening their saddles since Tom >>> Milton died (the founder, a famous ultra long distance guy in the Bay Area. >>> He died of a heart attack during the 2010 Devil Mountain Double, a 200-mile >>> ride that climbs both Mount Diablo near RivHQ and Mount Hamilton near San >>> Jose - twice each. Grant wrote up a decent memoriam in the newsletter at >>> the time; #43 or 44 or thereabouts). Milton was tall and skinny, and the >>> saddle rails were superlong, so he could get a wide range of adjustment. >>> Unfortunately for us less-skinny people, he didn't use superstrong steel, >>> so the rails routinely bent. After he died, the company was in chaos for >>> about a year. His sister took it over, and moved all the operations down to >>> San Diego, where she and her kids run everything. The saddles have gotten >>> shorter; there's no Pinocchio noses like the ones Tom made. But they've >>> continued to shorten them over the years; I have a 2013 saddle that's >>> definitely longer than my 2019 saddle, and the 2019 saddle is longer than >>> my several 2021 saddles. >>> >>> The clampable section of the rails on my aforementioned broken H2 >>> modular saddle with a January 2021 serial number are definitely shorter >>> than the solid rails on an X1 I have, but the X1 is currently mounted, and >>> I can't see the serial number. I'm sure it's older, but I'll have to wait >>> until morning to check the date; it may be from before the last shortening. >>> I don't believe I've gotten a solid-rail saddle since 2019 (or a modular _2 >>> series saddle from before 2020), so I'm unclear whether the shorter clamp >>> areas on the rails are a reflection of the difference between modular and >>> welded rails, or a difference between pre- and post-2020 saddles generally. >>> >>> Peter Adler >>> owner of about 14 SA-As from a 20-year range, in various stages of >>> stretched-outness and bent-railness, including the one Grant did a >>> Frankenstein job on with X-Acto knives and twine that he wrote up in a >>> newsletter >>> Berkeley, CA/USA >>> >>> >>> On Thursday, April 13, 2023 at 12:23:53 PM UTC-7 JAS wrote: >>> >>> Eric, I had a similar set-back problem with my Platypus. Since I prefer >>> Selle Anatomica saddles, I ordered a new one for Platy in the pretty light >>> tan color only to discover that the new ones with aluminum rails have a >>> shorter rail length than the steel rails. >>> >>> -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/d6ea93a7-0934-461b-a9a4-46f2f3f6c1fbn%40googlegroups.com.
