Tire pressure recommendations

"Philip W. Moore, Jr." <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Does anybody have links to websites that discuss suggested tire pressures
for various types of terrain and weather experienced during racing? I've
typically run my psi at 120 regardless of the terrain or weather out of
habit, but have been told by some seasoned racing vets that I should lower
the psi to around 100.

I'm more interested in analysis than preference on this one...

r.b.tech would be better for this question but you might look at
http://www.terrymorse.com/bike/rolres.html
or
http://www.schwalbe.com/index.pl?punkt=265

JF

Philip W. Moore said:

Does anybody have links to websites that discuss suggested tire pressures
for various types of terrain and weather experienced during racing? I've
typically run my psi at 120 regardless of the terrain or weather out of
habit, but have been told by some seasoned racing vets that I should lower
the psi to around 100.

I'm more interested in analysis than preference on this one...

http://sheldonbrown.com/brandt/rolling-resistance.html

"gym gravity" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Philip W. Moore said:

Does anybody have links to websites that discuss suggested tire

pressures

Quoted message said:

Quoted message said:

for various types of terrain and weather experienced during racing?

I've

Quoted message said:

Quoted message said:

typically run my psi at 120 regardless of the terrain or weather out of
habit, but have been told by some seasoned racing vets that I should

lower

Quoted message said:

Quoted message said:

the psi to around 100.

I'm more interested in analysis than preference on this one...

http://sheldonbrown.com/brandt/rolling-resistance.html

Please! Jobst is the bozo who told Carl and I that we needn't bother putting
more than 120psi in our track tires. Then Jobst started quoting his outdated
and irrelevant tire studies that do not include any tires made during the
last 3-5 years nor any Continentals.

For the OP who I presume was asking about road racing, the best pressure
will depend on the road's surface, his weight, cornering ability, length of
race, wet or dry roads, etc.

105-120 psi is a good place to start with about 10 psi less in the front
tire.

-WG

-WG

-WG

"Warren" wrote...

Quoted message said:

105-120 psi is a good place to start with about 10 psi less in the front
tire.

What's the rationale behind ten pounds less in the front Warren?

Jim

"Jim Flom" <[email hidden]> wrote in message
news:GVykd.136805$df2.11836@edtnps89...

Quoted message said:

"Warren" wrote...

Quoted message said:

105-120 psi is a good place to start with about 10 psi less in the front
tire.

What's the rationale behind ten pounds less in the front Warren?

So it doesn't bounce around (less of your weight on it) as much, especially
in corners.

-WG

gym gravity said:

Philip W. Moore said:

Does anybody have links to websites that discuss suggested tire pressures
for various types of terrain and weather experienced during racing? I've
typically run my psi at 120 regardless of the terrain or weather out of
habit, but have been told by some seasoned racing vets that I should lower
the psi to around 100.

I'm more interested in analysis than preference on this one...

http://sheldonbrown.com/brandt/rolling-resistance.html

In the above, "These comparative values" implies there is some actual
data somewhere, but it's not on the cited page. Where might one find
it?

jeverett3<AT>earthlink<DOT>net http://home.earthlink.net/~jeverett3

Warren said:

Quoted message said:

Philip W. Moore said:

I'm more interested in analysis than preference on this one...

Please! Jobst is the bozo who told Carl and I that we needn't bother putting
more than 120psi in our track tires. Then Jobst started quoting his outdated
and irrelevant tire studies that do not include any tires made during the
last 3-5 years nor any Continentals.

Well, the OP was looking for an analysis, rather than a preference. At
least by posting what I did, now he has an analysis (of sorts) as well
as your preference.

Quoted message said:

For the OP who I presume was asking about road racing, the best pressure
will depend on the road's surface, his weight, cornering ability, length of
race, wet or dry roads, etc.

105-120 psi is a good place to start with about 10 psi less in the front
tire.

John Everett said:

Quoted message said:

http://sheldonbrown.com/brandt/rolling-resistance.html

In the above, "These comparative values" implies there is some actual
data somewhere, but it's not on the cited page. Where might one find
it?

http://www.terrymorse.com/bike/rolres.html

"gym gravity" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Warren said:

Quoted message said:

Philip W. Moore, Jr. wrote:
>I'm more interested in analysis than preference on this one...
>
>

Please! Jobst is the bozo who told Carl and I that we needn't bother

putting

Quoted message said:

Quoted message said:

more than 120psi in our track tires. Then Jobst started quoting his

outdated

Quoted message said:

Quoted message said:

and irrelevant tire studies that do not include any tires made during

the

Quoted message said:

Quoted message said:

last 3-5 years nor any Continentals.

Well, the OP was looking for an analysis, rather than a preference. At
least by posting what I did, now he has an analysis (of sorts) as well
as your preference.

I agree.

-WG

"Warren" <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

"gym gravity" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Philip W. Moore said:

Does anybody have links to websites that discuss suggested tire

pressures

Quoted message said:

Quoted message said:

for various types of terrain and weather experienced during racing?

I've

Quoted message said:

Quoted message said:

typically run my psi at 120 regardless of the terrain or weather out of
habit, but have been told by some seasoned racing vets that I should

lower

Quoted message said:

Quoted message said:

the psi to around 100.

I'm more interested in analysis than preference on this one...

http://sheldonbrown.com/brandt/rolling-resistance.html

Please! Jobst is the bozo who told Carl and I that we needn't bother putting
more than 120psi in our track tires. Then Jobst started quoting his outdated
and irrelevant tire studies that do not include any tires made during the
last 3-5 years nor any Continentals.

So, Warren, what difference do you believe there is between "new"
tires and the series that Jobst tested?

Quoted message said:

For the OP who I presume was asking about road racing, the best pressure
will depend on the road's surface, his weight, cornering ability, length of
race, wet or dry roads, etc.

105-120 psi is a good place to start with about 10 psi less in the front
tire.

The optimal pressure depends on a group of variables. What about rider
weight and tire size? Tractions isn't going to change much regardless
of tire pressure.

Generally the upshot of it is that higher pressure equals lower
rolling resistance, higher incidence of flats and cord failures. Lower
pressure has fewer flats, very slightly higher rolling resistance and
generally better ride.

As it turns out the tire pressures between 95 and 120 are a good
compromise.

"Tom Kunich" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

"Warren" <[email hidden]> wrote in message news:<0ovkd.19958

Quoted message said:

So, Warren, what difference do you believe there is between "new"
tires and the series that Jobst tested?

The silica-based tire treads, for one thing. Also, many of the newer tires
have more supple casings than the older tires and casings made of different
materials.

Quoted message said:

Quoted message said:

For the OP who I presume was asking about road racing, the best pressure
will depend on the road's surface, his weight, cornering ability, length

of

Quoted message said:

Quoted message said:

race, wet or dry roads, etc.

105-120 psi is a good place to start with about 10 psi less in the front
tire.

The optimal pressure depends on a group of variables. What about rider
weight and tire size?

I mentioned "his weight" above.

Tractions isn't going to change much regardless

Quoted message said:

of tire pressure.

Assuming the rider is good at cornering, cornering is dramatically affected
by tire pressures. 10psi is noticeable to me.

-WG