The effective spring rate is going to depend on volume, isn't it, because the volume says how much air there is and that determines how much compression there can be? And the contact patch is going to depend on diameter, isn't it?
The derivative of the contact patch with respect to what? On Tue, Jun 10, 2014 at 6:34 PM, ted <ted.ke...@comcast.net> wrote: > I would think we care about effective spring rate (cush) and how much > additional travel is possible before getting a pinch flat. Aren't those > driven by the contact patch size, its derivative, and the height of the > tire? How does cross section area (or volume) drive those? > Are you sure this is a diameter squared dependency? > > On Tuesday, June 10, 2014 5:31:44 PM UTC-7, Anne Paulson wrote: > >> It's 6% in diameter, but that makes 12% difference in volume, which is >> what we care about. >> >> >> On Tue, Jun 10, 2014 at 4:56 PM, Deacon Patrick <lamon...@mac.com> wrote: >> >>> That's about a 6% discrepancy, which certainly seems reasonable given >>> different rim widths and tire stretch. >>> >>> With abandon, >>> Patrick >>> >>> >>> On Tuesday, June 10, 2014 4:52:31 PM UTC-6, Anne Paulson wrote: >>>> >>>> If you order some of Jan Heine's tires, be aware of a size discrepancy. >>>> >>>> I just got a couple of his Grand Bois tires, which are sold as 700 x >>>> 32mm. I knew they were made by Panaracer, and I have used the Panaracer >>>> Pasela 32mm and the Jack Brown 33mm tires, so I figured I knew what to >>>> expect. When the tires arrived, they looked narrower than I expected. Then, >>>> when I opened them up, they were labelled 700 x 30. Then, when I mounted >>>> them on my Mavic Open Pro rims, they measured 30mm wide. >>>> >>>> When I asked Jan, he explained that he has a different system of >>>> measurement, and according to his measurement system (mounting them on some >>>> rim or other) they measure 32mm. >>>> >>>> So, expect the Grand Bois tires to be narrower than other tires sold >>>> with the same width. >>>> >>>> -- >>>> -- Anne "Standards are good, everyone should have one" Paulson >>>> >>>> It isn't a contest. Enjoy the ride. >>>> >>> -- >>> 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. >>> To post to this group, send email to rbw-owne...@googlegroups.com. >>> >>> Visit this group at http://groups.google.com/group/rbw-owners-bunch. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> -- Anne Paulson >> >> It isn't a contest. Enjoy the ride. >> > -- > 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 http://groups.google.com/group/rbw-owners-bunch. > For more options, visit https://groups.google.com/d/optout. > -- -- Anne Paulson It isn't a contest. Enjoy the ride. -- 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 http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
