I have to believe that shimmy has a strong component of Human Body in it. My good friend and 35 year cyclist, twice trans-America rider, and former wrench has had many bikes over the years and has had shimmy on every one of them. Given the variety of his bikes, geometries, materials, etc. that his particular build is the only common factor and, therefore, evidence of at least one cause outside the realm of design. I'd be willing to bet that every bike ever designed has shimmied under a rider at some point. Does that mean every design is flawed? No, of course not. I, OTOH, have never had a bike shimmy, nor have I witnessed it, in my 35 years of semi-serious cycling. Ultimately, shimmy caused by poor frame design is probably the most intuitive rationale, but rarely the true and total cause.
----- Original Message ----- From: CycloFiend To: rbw-owners-bunch@googlegroups.com Sent: Tuesday, September 16, 2008 8:01 PM Subject: [RBW] Re: Low trail Atlantis fork on 9/16/08 5:04 PM, EricP at [EMAIL PROTECTED] wrote: > In the interest of fairness - I recently posted on a different list > about shimmy. And mentiond there that my Atlantis does the shimmy the > most. Of course, there is a lot of seatpost showing on that bike. > Along with a lot of stem. And pretty fat tires, Schwalbe Big Apple > 2.15. Oh, and I have the Nitto mini rack and often a Little Loafer on > the bike. And all of this means nothing. It could be one of these > things, and it could be none of them. > > None of this also makes the Atlantis less than my favorite bike. And > the most stable on downhill runs. > > But that's just me. And what do I know? Hey there Eric - My comments weren't to dismiss the occurence of shimmy when it occurs - I hope it didn't come across that way. I've seen it, heard stories, seen abrasions and damage from folks who panicked, locked up and lost it, but been lucky to have it happen only one time to me directly. I honestly think that shimmy is one of the least well understood conditions which can occur on a bike. There is a lot of conjecture on the subject, but little study. Jobst Brandt wrote a good reference on it: http://www.sheldonbrown.com/brandt/shimmy.html - Jim -- Jim Edgar [EMAIL PROTECTED] Cyclofiend Bicycle Photo Galleries - http://www.cyclofiend.com Current Classics - Cross Bikes Singlespeed - Working Bikes Your Photos are needed! - http://www.cyclofiend.com/guidelines "I thought the idea was to waste the rest of our lives together.." -- Cyril, "Breaking Away" ------------------------------------------------------------------------------ No bugs in this e-mail! Checked by AVG - http://www.avg.com Version: 8.0.169 / Virus Database: 270.6.21/1675 - Release Date: 9/16/2008 7:06 PM --~--~---------~--~----~------------~-------~--~----~ 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-bunch@googlegroups.com 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 -~----------~----~----~----~------~----~------~--~---
