Jim has done a very good job here by comparing different widths in essentially the same high-quality tire - there is no significant weight difference here. Throwing out a data point, my buddy's Tournado on Dahon-specific 35mm Schalwalbe's rolls every bit as efficiently as my Moser on 27-rear/ 25-front Challenge tubies (both bikes on American Classic hubs). A good soft tire with high tpi casing will have a spherical contact patch, while a skinny hard high pressure tire will have an oval contact patch of essentially the same area, so there is little difference in that effect on rolling resistance. There is a good argument that a heavier tire with low rolling resistance will go just as fast a lighter tire - while that's true, the lighter tire/wheel has less inertia, so it accelerates easier and brakes much better - these things you can feel.
On Thursday, January 2, 2014 9:12:10 AM UTC-6, Jim Bronson wrote: > > Where does tire weight factor in to all this? I personally find lighter > tires to be faster for the most part, whether they're 23mm or 38mm (the > widths I am running on my Paul Taylor and Rivendell respectively). > > > On Thu, Jan 2, 2014 at 8:21 AM, Jan Heine <hei...@earthlink.net<javascript:> > > wrote: > >> Even though most RBW folks may not care all that much about going fast, >> it's still nice to know that a wider tire doesn't roll any slower. We >> summarized the data in our blog here: >> >> http://janheine.wordpress.com/2014/01/01/tires-how-wide-is-too-wide/ >> >> If anything, it may help persuade those we meet on our rides, who look at >> our bikes and are intrigued by the idea of a more comfortable bike with >> wider tires, but are afraid they won't be able to keep up with their >> friends if they add 5 or 10 mm to their tire width. >> >> Happy New Year! >> >> Jan Heine >> Editor >> Bicycle Quarterly >> www.bikequarterly.com >> >> Follow our blog at www.janheine.wordpress.com >> >> -- >> 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 <javascript:>. >> To post to this group, send email to >> rbw-owne...@googlegroups.com<javascript:> >> . >> Visit this group at http://groups.google.com/group/rbw-owners-bunch. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > > > -- > Keep the metal side up and the rubber side down! > -- 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/groups/opt_out.
