On Aug 6, 2012, at 10:51 AM, robert zeidler <zeidler.rob...@gmail.com> wrote:
> Or the endless opinion that fatter tires are every bit as fast as > skinny tires. No way. More comfortable? Absolutely. Better on dirt? > For sure. Not faster. This is measurable. Avocet did testing on this in the 80s, and others have more or less duplicated, and found that up to about 25 mm wider was faster but this effect dropped off due to the necessity to change to a coarser fabric for the casing due to- if I recall correctly- hoop stress increasing faster than the minor diameter increases. Basically a casing made from the fine high-TPI fabric possible at 18-25 mm is prone to failure at widths of 28-35 mm. This may have been for cotton casings and I don't know if the same holds true for synthetic casing fabrics. I have found that wider tires are more prone to casing failures, less prone to pinch flats and about the same for punctures. At 6'4" and 230 lbs, I also find I have to inflate all tires to the rated pressure with the result that differences in comfort are not really all that noticeable. A little, maybe. -- 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 rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
