Make the tubes big enough, and even a tandem doesn't need mid-tubes: http://www.thetandemlink.com/Images/Calfee/calfee_rolfs1a.jpg
I don't think a solo built with tubes that big would look too graceful, though. On a frame as big as a 68, an arrangement like the Hunquapillar might start to make sense. Just my opinion, I ride a 56 and don't need the extra stiffness myself. Bill On Jun 4, 7:11 am, Seth Vidal <skvi...@gmail.com> wrote: > On Fri, Jun 4, 2010 at 9:57 AM, Larry Powers <lapower...@hotmail.com> wrote: > > Maybe this is a better question for a frame builder but would wider tubes > > solve the problem just as well as a double top tube? My steel tandem uses > > slightly oversized tubing to add some rigidity. Given the size of the bike > > the wider tubes look appropriate. On something like a 66 or 68 frame I > > would think that 31.8 tubing might allow a standard diamond frame to be > > used. > > Unless your tandem is very very old you should have some sort of > cross-support tube in the middle of it going from the top of the head > tube, normally, to the bottom of the stoker's seat tube. > > like this one:http://www.flickr.com/photos/skvidal/2673426270/ > > but it'd easiest to ask a framebuilder, I suspect. Bilenky, bob brown > cycles both build tandems. > > -sv -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bu...@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
