On 03/20/2014 08:26 AM, Patrick Moore wrote:
What tire is the "S-B"?
I'm pretty sure SB is the Challenge Strada Bianca, which is a 30+mm
version of the Parigi Roubaix.
I tend to run my tires lower than what many others describe: 60-65 for
the PRs, ~ 90 for skinny 23s, sub 30 for the 55 mm Furious Freds,
55-60 for the 1.35 mm Kojaks on the 559 commuter. (I weigh 175.) At
more than these pressures all start to feel rough.
Our roads are generally medium good -- c+ to b- --, but we do have
many, often very wide expansion cracks; 3-4" is common. I never
(crossing fingers) pinch flat; the last time I did so occurred a few
years ago when I deliberately rode 190 gram, 22 mm 559 Turbos into a
patch of large gravel pieces to see what would happen.
But obviously wider means lower pressure (and a lower "harshness"
threshold); and interesting to note, the lighter tires appear to
require more air for a given width before feeling that "lack of
support"; conversely, sturdier tires have a lower pressure "harshness"
threshold: example, the FFs require at least 25, while the Big Apples,
admittedly 5 mm wider, felt very hard at that same pressure.
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