On Jan 5, 9:15*pm, wrote:
Lou Holtman wrote:
I wouldn't demand that a road bike fit 32s, like mine does, but
if it fits 28s or 25s with fenders, it gives you options for
free. *Why not?
There are times of the year when 32s are really nice to be able to
install, and times when the lower rolling resistance of the
narrower 23s is desirable. *23-32 is not an unreasonable range to
insist upon for a road bike.
Scharf should realize that for a given casing construction, tread,
and inflation pressure, a wider tire has *less* rolling resistance.
and you should know that in that case the narrower tire is more
comfortable.

I think you might review what keeps the tire from bottoming when
inflated. *I think that is often overlooked in such discussions.


I think you may need to review your tone, this is not 1987 any more.


FAQ item:

Subject: 8b.25 * What holds the rim off the ground?
From: *Jobst Brandt

# What forces keep the rim of a wheel with pneumatic tires off the
# ground. It obviously can't be the air pressure because that's acting
# from top as well as from below.

# As has been pointed out, the casing walls pull on the rim (or its
# equivalent) and thereby support the load. *The casing leaves the rim
# at about a 45 degree angle, and being essentially a circular cross
# section, it is in contact with the rim over its inner quarter
# circle. *At least this is a good representative model. *The
# visualization may be simpler if a tubular tire is considered. *It
# makes no difference whether the tire is held on by glue or is
# otherwise attaches to the rim such as a clincher is. *Either way the
# tire is attached to the rim, a relatively rigid structure.
*--
Jobst Brandt