Eric,Steve I clumsily overstated the front triangle flex of my Sam. It's not a problem. It's also not a swinging unsupported saddlebag, but that doesn't particularly matter.
I should have simply posted that I think Grant designed in the 2TT option to stiffen the front triangle of the larger Sam (rather than strengthen it against failure or merely add it for looks). I haven't discussed it with him, but that's my guess. I might be wrong. On May 5, 2:56 pm, EricP <[email protected]> wrote: > Will agree with Steve here. Have had my 56cm Sam Hillborne loaded up > with 25 plus pounds of gear in panniers and rear rack and have had no > noticable issues with frame flexiness. Even a loaded Carradice Nelson > Longflap doesn't seem to change the handling. Other than weight shift > of where the load is located. Add to the fact that last year my > weight was around 240. So for my use, the Hillborne with a single > tube (Singleborne?) is not under stiff. > > That being said, I personally like the look of double top tubes on the > larger Bombadil. > > Eric Platt > St. Paul, MN > > On May 5, 4:48 pm, Steve Palincsar <[email protected]> wrote: > > > > > On Wed, 2010-05-05 at 14:22 -0700, William wrote: > > > The 2TT has almost nothing to do with strength and almost everything > > > to do with stiffness under cargo load. > > > > A campeur didn't get extra tubes because Randonneurs were breaking > > > their frames: > > > >http://www.flickr.com/photos/bicigirl/4037516334/ > > > Yes, but the bike shown in that photo does not have two top tubes. It > > has diagonal stays. I'm not sure I've ever seen a photo of a campeur > > with two top tubes. > > > > A stiffer frame just responds to load better. > > > If a double top tube was needed to make a heavy duty camping bike, I'm > > pretty sure Bruce Gordon and Bilenky would be using them on their > > camping (i.e., loaded touring) bikes. > > > The only double top tubes I can recall (other than these new Rivendells) > > are roadsters and newsboy bikes, and in the case of the newsboy bikes I > > think the double top tube existed chiefly to provide something to attach > > the "tanks" to. > > > > My 56 Hillborne is > > > really floppy when my saddlesack Large is stuffed and I'm out of the > > > saddle. The whole frame twists from that rocking load. > > > Maybe you ought to get some kind of saddle bag support or rack to attach > > that flopping bag to. > > > > If you never > > > load the Sam with cargo, you'll likely never notice and never need > > > it. > > > A flopping saddle bag isn't at all the same thing as well secured > > panniers attached to a sturdy rear rack. > > > -- > > You received this message because you are subscribed to the Google Groups > > "RBW Owners Bunch" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]. > > For more options, visit this group > > athttp://groups.google.com/group/rbw-owners-bunch?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group > athttp://groups.google.com/group/rbw-owners-bunch?hl=en. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
