jobst.brandt said:What do you mean by "sturdier sidewalls" and for what benefit?
The Carbons have an extra ply, and their sidewalls don't unravel like the
Contis'. Empirically the Carbons seem to be relatively damage proof,
while the Contis are not.
Quoted message said:How does this result in lower rolling resistance.
Obviously it doesn't, since thicker sidewalls usually mean higher rolling
resistance. But in spite of that the Carbons have shown lower rolling
resistance than most, in tire tests done by European magazines. This data
has been posted here ad nauseum.
Quoted message said:Quoted message said:The Pro2 Race seems to work well for the fastest descenders, even in
the rain. The Carbon and Ultra 2000 may have marginally better grip
because of their carbon black tread, but not enough to matter.
How has this been determined?
Again, tire tests have given higher cornering grip scores to the Carbon,
and the black Conti tires (Gatorskin and Ultra 2000). But as far as the
difference goes, as I said the fastest descenders seem to do fine with the
silica-treaded Pro2 Race. They're popular tires among pros. Some of the
fastest descenders around here (Cat IIs and ex-pros) ride them and still
beat everyone, without problems, where there are plenty of steep mountain
descents and it rains frequently.
Quoted message said:I am using several Ultra 2000 tires, that were given to me, for the tire
blow-off tests that I mentioned months ago. This involves a data
recorder, mounted in the wheel, connected to a pressure sensor on the
valve and a thermocouple on the rim. First tests gave interesting
results, different from expected, giving a new perspective to inflation
pressure and tire blow-offs.
More later.
Keep it coming! FWIW the Carbons seem to be a tight fit on most rims, if
that makes a difference.
Matt O.