tire air pressure - Page 10 - Cycling Mob: Road Cycling, Mountain Biking and More

06-16-2004, 06:10 AM

"Antti Salonen" <[Only registered and activated users can see links. ].cc.helsinki.fi.invalid> wrote in message
news:cape3k$o6j$[Only registered and activated users can see links. ]...
> David Kerber <[Only registered and activated users can see links. ]> wrote:
>
> >> 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.
>
> 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

06-16-2004, 10:49 AM

On Wed, 16 Jun 2004 13:10:38 +0000, curt wrote:

>
> "Antti Salonen" <[Only registered and activated users can see links. ].cc.helsinki.fi.invalid> wrote in message
> news:cape3k$o6j$[Only registered and activated users can see links. ]...
>> David Kerber <[Only registered and activated users can see links. ]> wrote:
>>
>> >> 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.
>>
>> 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 :-)

06-16-2004, 10:49 AM

On Wed, 16 Jun 2004 13:10:38 +0000, curt wrote:

>
> "Antti Salonen" <[Only registered and activated users can see links. ].cc.helsinki.fi.invalid> wrote in message
> news:cape3k$o6j$[Only registered and activated users can see links. ]...
>> David Kerber <[Only registered and activated users can see links. ]> wrote:
>>
>> >> 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.
>>
>> 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 :-)

06-16-2004, 10:49 AM

On Wed, 16 Jun 2004 13:10:38 +0000, curt wrote:

>
> "Antti Salonen" <[Only registered and activated users can see links. ].cc.helsinki.fi.invalid> wrote in message
> news:cape3k$o6j$[Only registered and activated users can see links. ]...
>> David Kerber <[Only registered and activated users can see links. ]> wrote:
>>
>> >> 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.
>>
>> 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 :-)

06-16-2004, 10:49 AM

On Wed, 16 Jun 2004 13:10:38 +0000, curt wrote:

>
> "Antti Salonen" <[Only registered and activated users can see links. ].cc.helsinki.fi.invalid> wrote in message
> news:cape3k$o6j$[Only registered and activated users can see links. ]...
>> David Kerber <[Only registered and activated users can see links. ]> wrote:
>>
>> >> 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.
>>
>> 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 :-)

06-16-2004, 10:49 AM

On Wed, 16 Jun 2004 13:10:38 +0000, curt wrote:

>
> "Antti Salonen" <[Only registered and activated users can see links. ].cc.helsinki.fi.invalid> wrote in message
> news:cape3k$o6j$[Only registered and activated users can see links. ]...
>> David Kerber <[Only registered and activated users can see links. ]> wrote:
>>
>> >> 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.
>>
>> 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 :-)

07-03-2004, 03:18 AM

"Resound" <[Only registered and activated users can see links. ]> schreef in bericht
news:viwzc.31380$[Only registered and activated users can see links. ]...
> Bert L.Am wrote:
> > "billy d." <[Only registered and activated users can see links. ]> schreef in bericht
news:83f64ab8.04-
> >
[Only registered and activated users can see links. ]ews:83f64ab8.0406140130.6a1a87a0@p-
> > osting.google.com...
> > > 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

>

From this end of the world we are used to think in International Standards.
I can calculate from cm into inches, but from Celsius in Fahrenheit is
already too difficult for me. Not to mention al the other alien measurement
standards you people are using.

07-03-2004, 03:18 AM

"Resound" <[Only registered and activated users can see links. ]> schreef in bericht
news:viwzc.31380$[Only registered and activated users can see links. ]...
> Bert L.Am wrote:
> > "billy d." <[Only registered and activated users can see links. ]> schreef in bericht
news:83f64ab8.04-
> >
[Only registered and activated users can see links. ]ews:83f64ab8.0406140130.6a1a87a0@p-
> > osting.google.com...
> > > 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

>

From this end of the world we are used to think in International Standards.
I can calculate from cm into inches, but from Celsius in Fahrenheit is
already too difficult for me. Not to mention al the other alien measurement
standards you people are using.

07-03-2004, 03:18 AM

"Resound" <[Only registered and activated users can see links. ]> schreef in bericht
news:viwzc.31380$[Only registered and activated users can see links. ]...
> Bert L.Am wrote:
> > "billy d." <[Only registered and activated users can see links. ]> schreef in bericht
news:83f64ab8.04-
> >
[Only registered and activated users can see links. ]ews:83f64ab8.0406140130.6a1a87a0@p-
> > osting.google.com...
> > > 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

>

From this end of the world we are used to think in International Standards.
I can calculate from cm into inches, but from Celsius in Fahrenheit is
already too difficult for me. Not to mention al the other alien measurement
standards you people are using.

07-03-2004, 03:18 AM

"Resound" <[Only registered and activated users can see links. ]> schreef in bericht
news:viwzc.31380$[Only registered and activated users can see links. ]...
> Bert L.Am wrote:
> > "billy d." <[Only registered and activated users can see links. ]> schreef in bericht
news:83f64ab8.04-
> >
[Only registered and activated users can see links. ]ews:83f64ab8.0406140130.6a1a87a0@p-
> > osting.google.com...
> > > 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

>

From this end of the world we are used to think in International Standards.
I can calculate from cm into inches, but from Celsius in Fahrenheit is
already too difficult for me. Not to mention al the other alien measurement
standards you people are using.