tire air pressure

On 14 Jun 2004 02:30:20 -0700, [email hidden] (billy d.)

Quoted message said:

what should my tire air pressure be at for a trek road bike?

How much do you weight, and what does it say on the sidewalls of your
tires?

Barry

In article <[email hidden]>, tungsteneer3
@yahoo.com says...

Quoted message said:

what should my tire air pressure be at for a trek road bike?

Makes no difference if it's a trek or whatever, go read what it says about
max pressure on the tire.

--
"There's a fine line between an attitude problem and thinking clearly."
d.B. ICQ: 138579247

On 14 Jun 2004 02:30:20 -0700, [email hidden] (billy d.)

Quoted message said:

what should my tire air pressure be at for a trek road bike

What does the side wall say? With good tires and rims you can exceed
the sidewall rating somewhat.

I use to run 115psi on my road bike.

"billy d." <[email hidden]> schreef in bericht
news:[email hidden]...

Quoted message said:

what should my tire air pressure be at for a trek road bike?

depending on what it says in de side on the tire

e.g. my off road Racing Ralph from Schwalbe say: inflate between 2,0 and 4,0
atm.
depending on the status of the tracks I will be riding I make a choice:

dunes or beach: 1,8 - 2,0 (front - rear)
loose sand in fores: 3,0 - 3,5
hard rock: 3,0 - 3,5

the race bikes Schwalbe Stelvio's can take air pressures up to 10 atm.
I inflate them with 7.0 - 8.0 on cobble stones and increase to 8.0 - 9.0 for
time trial like events.

bert

--
Posted by news://news.nb.nu

Bonehenge wrote:
:: On 14 Jun 2004 02:30:20 -0700, [email hidden] (billy d.)
:: wrote:
::
::: what should my tire air pressure be at for a trek road bike?
::
:: How much do you weight, and what does it say on the sidewalls of your
:: tires?
::
:: Barry

How does rider weight factor into tire inflation?

Roger Zoul said:

How does rider weight factor into tire inflation?

Heavier riders can get better performance and avoid pinch flats by
exceeding the printed maximum inflation. Very light riders can get
better handling by slightly under inflating tires.

Did you ever notice that tire inflation pressures are often provided
as a range, not a single pressure?

I'm a bigger rider (235 lbs.), and have found that my Michelins ride
the best for me at about 125 psi. The sidewall maximum is 115 psi.
I've ridden with very light women who have found that maximum
inflation can cause their tires to feel skitterish during hard
cornering.

Barry

Roger Zoul said:

Bonehenge wrote:
:: On 14 Jun 2004 02:30:20 -0700, [email hidden] (billy d.)
:: wrote:
::
::: what should my tire air pressure be at for a trek road bike?
::
:: How much do you weight, and what does it say on the sidewalls of your
:: tires?
::
:: Barry

How does rider weight factor into tire inflation?

I believe the same principle applies here that applies to motor
vehicles/rvs...I run different pressures based on the load and this is
in accordance with the tables from tire manufacturers. Look at the
label on your vehicle door jamb...pressures are specified for specific
loads/weights.

When I commuted on my mtn bike (with fat road tires) I ran around 115
psi even though the tires were labelled for 80. I weigh 200lbs.

My bike shop also says that given good rims and good tires the
labelled pressure can be safely exceeded, within reason.

It is too bad bike tire manufacturers can't provide the same type
information.

Bert L.Am said:

"billy d." <[email hidden]> schreef in bericht news:83f64ab8.04-
[email hidden]:83f64ab8.0406140130.6a1a87a0@p-
osting.google.com...

Quoted message said:

what should my tire air pressure be at for a trek road bike?

depending on what it says in de side on the tire
e.g. my off road Racing Ralph from Schwalbe say: inflate between 2,0 and
4,0 atm. depending on the status of the tracks I will be riding I
make a choice:
dunes or beach: 1,8 - 2,0 (front - rear) loose sand in fores: 3,0 - 3,5
hard rock: 3,0 - 3,5
the race bikes Schwalbe Stelvio's can take air pressures up to 10 atm. I
inflate them with 7.0 - 8.0 on cobble stones and increase to 8.0 - 9.0
for time trial like events.
bert
--
Posted by news://news.nb.nunews://news.nb.nu

Nicely informative, but I'm going to go out on a limb here and make the
assumption that there are a few people who don't know that 1
atmosphere=14.7lb/in.² 😄

--

Bonehenge wrote:
:: On Mon, 14 Jun 2004 18:57:10 -0400, "Roger Zoul"
:: <[email hidden]> wrote:
::
::
::: How does rider weight factor into tire inflation?
::
:: Heavier riders can get better performance and avoid pinch flats by
:: exceeding the printed maximum inflation. Very light riders can get
:: better handling by slightly under inflating tires.
::
:: Did you ever notice that tire inflation pressures are often provided
:: as a range, not a single pressure?
::
:: I'm a bigger rider (235 lbs.), and have found that my Michelins ride
:: the best for me at about 125 psi. The sidewall maximum is 115 psi.
:: I've ridden with very light women who have found that maximum
:: inflation can cause their tires to feel skitterish during hard
:: cornering.

I weigh 240 lbs so this is good info for me. Thanks.

brian-s-jones-at-comcast.net wrote:
:: On Mon, 14 Jun 2004 18:57:10 -0400, "Roger Zoul"
:: <[email hidden]> wrote:
::
::: Bonehenge wrote:
::::: On 14 Jun 2004 02:30:20 -0700, [email hidden] (billy d.)
::::: wrote:
:::::
:::::: what should my tire air pressure be at for a trek road bike?
:::::
::::: How much do you weight, and what does it say on the sidewalls of
::::: your tires?
:::::
::::: Barry
:::
::: How does rider weight factor into tire inflation?
::
::
:: I believe the same principle applies here that applies to motor
:: vehicles/rvs...I run different pressures based on the load and this
:: is in accordance with the tables from tire manufacturers. Look at the
:: label on your vehicle door jamb...pressures are specified for
:: specific loads/weights.
::
:: When I commuted on my mtn bike (with fat road tires) I ran around 115
:: psi even though the tires were labelled for 80. I weigh 200lbs.
::
:: My bike shop also says that given good rims and good tires the
:: labelled pressure can be safely exceeded, within reason.
::
:: It is too bad bike tire manufacturers can't provide the same type
:: information.

The owner of my LBS told me that the max psi rating on a tire means that you
can inflate it to twice the listed max before the tire will explode. I
don't plan to test that out 🙂

Thanks for the info...I weigh 240 so this is useful info for me.

Roger Zoul said:

How does rider weight factor into tire inflation?

Take a look at this chart:

http://www.precisiontandems.com/photos_files/tirechart.jpg

Art Harris

Nice to know I'm not the only "plus" sized guy on a bike - I weigh 280lbs.

Arlie C.

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

Quoted message said:

brian-s-jones-at-comcast.net wrote:
:: On Mon, 14 Jun 2004 18:57:10 -0400, "Roger Zoul"
:: <[email hidden]> wrote:
::
::: Bonehenge wrote:
::::: On 14 Jun 2004 02:30:20 -0700, [email hidden] (billy d.)
::::: wrote:
:::::
:::::: what should my tire air pressure be at for a trek road bike?
:::::
::::: How much do you weight, and what does it say on the sidewalls of
::::: your tires?
:::::
::::: Barry
:::
::: How does rider weight factor into tire inflation?
::
::
:: I believe the same principle applies here that applies to motor
:: vehicles/rvs...I run different pressures based on the load and this
:: is in accordance with the tables from tire manufacturers. Look at the
:: label on your vehicle door jamb...pressures are specified for
:: specific loads/weights.
::
:: When I commuted on my mtn bike (with fat road tires) I ran around 115
:: psi even though the tires were labelled for 80. I weigh 200lbs.
::
:: My bike shop also says that given good rims and good tires the
:: labelled pressure can be safely exceeded, within reason.
::
:: It is too bad bike tire manufacturers can't provide the same type
:: information.

The owner of my LBS told me that the max psi rating on a tire means that

you

Quoted message said:

can inflate it to twice the listed max before the tire will explode. I
don't plan to test that out 🙂

Thanks for the info...I weigh 240 so this is useful info for me.

In article <pFFzc.38453$eu.22899@attbi_s02>, [email hidden]
says...

Quoted message said:

Nice to know I'm not the only "plus" sized guy on a bike - I weigh 280lbs.

Arlie C.

You may not believe it, but there are avid cyclists who post here who
outweigh you by 100lbs.

.....

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Remove the ns_ from if replying by e-mail (but keep posts in the
newsgroups if possible).

Harris wrote:
:: Roger Zoul <[email hidden]> wrote:
::
::: How does rider weight factor into tire inflation?
::
:: Take a look at this chart:
::
:: http://www.precisiontandems.com/photos_files/tirechart.jpg
::
:: Art Harris

Amazingly, according to this chart, I have might about right! Stroke of
pure luck...

Interesting. I am way over inflating. I just hate getting flats though.

Curt

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

Quoted message said:

Roger Zoul said:

How does rider weight factor into tire inflation?

Take a look at this chart:

http://www.precisiontandems.com/photos_files/tirechart.jpg

Art Harris

In article <[email hidden]>,
[email hidden] says...

Quoted message said:

Interesting. I am way over inflating. I just hate getting flats though.

Personally, I think that chart gives somewhat too low of a value for
recommended pressure. It doesn't list their criteria for what
determines the "best" pressure either.

Quoted message said:

Curt

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

Quoted message said:

Roger Zoul said:

How does rider weight factor into tire inflation?

Take a look at this chart:

http://www.precisiontandems.com/photos_files/tirechart.jpg

Art Harris

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Remove the ns_ from if replying by e-mail (but keep posts in the
newsgroups if possible).

David Kerber ns_dkerber@ns_ids.net said:

Quoted message said:

Interesting. I am way over inflating. I just hate getting flats though.

Quoted message said:

Personally, I think that chart gives somewhat too low of a value for
recommended pressure. It doesn't list their criteria for what
determines the "best" pressure either.

I'd have to agree with this. Together with the bike and other gear I
weigh about 155 lbs, and I've run my 23 mm tyres at pressures between
105 and 120 psi with no real discomfort. According to the graph, the
"ideal" inflation for me would be 80 psi, which seems ridiculous.

I guess I could get away with just 80 psi without getting too many pinch
flats (I get none now), so perhaps the graph can be helpful in determining
the lowest safe pressure. But especially for lighter riders, there's
usually no reason not to go higher than that.

-as

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

Quoted message said:

David Kerber ns_dkerber@ns_ids.net said:

Quoted message said:

Interesting. I am way over inflating. I just hate getting flats

though.

Quoted message said:

Quoted message said:

Personally, I think that chart gives somewhat too low of a value for
recommended pressure. It doesn't list their criteria for what
determines the "best" pressure either.

I'd have to agree with this. Together with the bike and other gear I
weigh about 155 lbs, and I've run my 23 mm tyres at pressures between
105 and 120 psi with no real discomfort. According to the graph, the
"ideal" inflation for me would be 80 psi, which seems ridiculous.

I guess I could get away with just 80 psi without getting too many pinch
flats (I get none now), so perhaps the graph can be helpful in determining
the lowest safe pressure. But especially for lighter riders, there's
usually no reason not to go higher than that.

-as

I weigh about 180, so there might be a concern, but I prefer the feel of my
tires at a high pressure. I am riding on 25's, which is a pretty big tire.
I think I will keep them up at 120ish as I have had no problems and seem to
like the lower resistance.

Curt

curt said:

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

Quoted message said:

David Kerber ns_dkerber@ns_ids.net said:

> Interesting. I am way over inflating. I just hate getting flats

though.

Quoted message said:

Quoted message said:

Personally, I think that chart gives somewhat too low of a value for
recommended pressure. It doesn't list their criteria for what
determines the "best" pressure either.

I'd have to agree with this. Together with the bike and other gear I
weigh about 155 lbs, and I've run my 23 mm tyres at pressures between
105 and 120 psi with no real discomfort. According to the graph, the
"ideal" inflation for me would be 80 psi, which seems ridiculous.

Ditto. I weigh about 155, the bike about 25, add 5 for clothing = 185.
The tires are 7x35C, so the chart indicates a pressure of 50-55 psi. The
tires themselves say "Inflate to 100 psi," and that is what I do. No
problems, and a comfortable ride. I've had two flats in 2000 km, but both
due to sharp objects. I think 50-55 would definitely amount to
underinflation -- the tires start to feel soft when they've lost that much
pressure.

My $0.02 :-)