The socketed seat tube lug can be standard across various frame sizes so long as the seat tube angle remains the same. Seat stay attachment is simplified. Seat post binder bolt is integrated so this eliminates a joint. Trek did something similar back in the late '80's. The reason for tig welding the head tube comes down to cost. It's cheaper than lugs both in terms of time and materials (lugs + filler metal).
On Saturday, June 17, 2017 at 8:01:00 PM UTC-4, Patrick Moore wrote: > > Pretty nice for a budget bike! > > Why the tigg'ing at the head tube instead of elsewhere? I suppose it has > to do with the economics of building, but can someone explain how this > choice affects costs? > > Also: any ideas why the socketed seat tube cluster instead of some other > design? Is this one for style? (Nothing wrong with that, btw.) > > And I wouldn't mind that Calfee! (But would prefer my 2 Riv custom fixies.) > > On Sat, Jun 17, 2017 at 2:39 PM, Jim M. <math...@gmail.com <javascript:>> > wrote: > >> Stopped by RBW for a few small things today and got to try the >> proto-Roadini. Here's an album with some pics: >> https://goo.gl/photos/uNuwi6pGPSEJf71w5 >> >> It is a very comfortable bike to ride, as are all Rivs. 46cm chainstay on >> this 57cm, so it's longer than a Roadeo and shorter than Clem, etc. Rides >> very smooth, corners confidently, and it's easy to envision the miles >> easily rolling away under the wheels. When I got on, I checked the barends >> for shifters. Not finding any, I reached for the downtube, but what do you >> know, it has brifters. This proto is set up with a rapid rise XT derailer, >> which I like. >> >> Interesting new fastback seat lug. Cool headbadge. Grant's shin in one of >> the shots. And at the end is the top secret Riv proto carbon fiber fixie, >> badged as a Calfee to keep it incognito. >> >> jim m >> walnut creek, ca >> >> -- >> 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. >> > > > > -- > *30% Supply and Demand discount, listmembers only, on all resume, > LinkedIn, and writing services, until Demand equals Supply! And there's > more! 10% kickback for any referral resulting in fully paid, list-price > contract. And still more! I am offering services in trade for a road bike, > or frame and parts, that are period compatible with my AM hub, circa 1937 > to 1961. See my website for what I do and what I charge; email for details.* > > Resumes, LinkedIn profiles, bios, and letters that get interviews. > By-the-hour resume and LinkedIn coaching. > Other professional writing services. > http://www.resumespecialties.com/ > www.linkedin.com/in/patrickmooreresumespec/ > Patrick Moore > Alburquerque, Nouvelle Mexique, Vereinigte Staaten > ************************************************************************** > ************** > > > > -- 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.
