On Thu, Apr 29, 2010 at 11:23 AM, happyriding <happyrid...@yahoo.com> wrote:
> > > How is Q a property of the crank? Wouldn't the bottom bracket that is > necessary to allow the crank to clear the chain stays determine the > Q? Or do some cranks only fit on certain narrower bottom brackets? > I'm not quite clear on what, exactly, you are asking, but if you mean to ask, "How does the crank determine Q more than the bb spindle length," the answer is, "Dunno, but it certainly, most certainly do." I had Phil make me a massively long 145 mm spindled bb assembly so that I could use a beloved 175 mm Cyclotourist crankset on a wide-stayed mountain bike. Q was 160. That's a 145 mm spindle, folks. OTOH, the 108 or 113 spindle and Sugino XD or whatever the hell it is stock triple on the newly acquired Sam Hill triple has a Q of about 160; note that: 145, 113, 160. Difference? Not the spindles, obviously, but the "flare" of the arms. The Cyclotourists don't flare at all; the XDs flare like any modern crank. So: today's lesson: it's the crank arm flare, folks, that largely determines Q, not the spindle length. > > Also, has anyone had a problem adjusting to the huge Q of a Rivendell > bike? That is something I hadn't really considered. > > -- Patrick Moore Albuquerque, NM For professional resumes, contact Patrick Moore, ACRW at resumespecialt...@gmail.com (505) 227-0523 -- 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.
