basskisser wrote:

nitrogen helps tires run cooler


Only because when nitrogen is used instead of air, the pressure to
temperature ratio is more linear.

You really ought to stop kissing fish, it has diminished your powers of
reason.

rick

Rick wrote in message link.net...
basskisser wrote:

nitrogen helps tires run cooler


Only because when nitrogen is used instead of air, the pressure to
temperature ratio is more linear.

You really ought to stop kissing fish, it has diminished your powers of
reason.

rick

Well, then, please explain to the world how in the HELL nitrogen will
make a tire run cooler. You apparently don't know squat about the Laws
of Gases. Now, Im again telling you that the ONLY reason is that the
pressure to temperature ratio is more linear. Do you refute that? If
so, do tell why. Now, I suspect that you don't UNDERSTAND my answer,
and that is the reason that you don't think it's correct. So, allow me
to explain. The nitrogen doesn't expand as much as air, for a given
temperature change. Therefore, the nitrogen doesn't increase tire
pressure as much as air, when the temperature starts increasing. Thus,
a tire is less likely to expand, because of temperature increase, to
the point of rupture. BUT, the nitrogen does NOTHING to keep the
temperature of the tire from increasing, or decreasing for that
matter.

As some one else said check the wheel bearings. Also raise the air pressure to
the max allowable for the tires ( usually imprinted on the side wall ). NEVER
NEVER PUT WATER IN HIWAY TIRES. The centrifugal force could tear the tire apart
or worse in my opinion the water could get hot engulf to turn to steam and blow
up.

Mike
***********

This past Summer, took our 15 foot fiberglass on a long road trip
instead in the usual half mile to the marina. The tires are the small
4.80-8 utiltiy type tires, and needless to say, they overheated
badly.....
long story, but I'll be upgrading to a biger tire this Summer.

Here's my question. It seemed that the speed at which the load was
being carried created the heat. While pondering the trip home
(semi desperate and after a few beers) I considered filling the tires
with water (say 50%) in an attempt to dissipate the heat to the rims.

I never did this, but have pondered the the effects of water in a tire
at speed. Would the balance go for a bundle or would the water be
thrown evenly within the tire by the certifugal force?

I made the trip home by upping the pressure to 60 p.s.i. and by
driving slower.

Would water have helped of would I have been courting a disaster?

On 25 Oct 2003 23:08:05 GMT, (MIDEMETZ) wrote:

As some one else said check the wheel bearings. Also raise the air pressure to
the max allowable for the tires ( usually imprinted on the side wall ). NEVER
NEVER PUT WATER IN HIWAY TIRES. The centrifugal force could tear the tire apart
or worse in my opinion the water could get hot engulf to turn to steam and blow
up.

Mike
***********
Thanks for the feedback. I have since replaced the the hubs which
will allow for a bigger wheel, will upgrade the tires when $$$ allow.

I the army, (S.A.D.F.) we used to put water in our Unimog tires. This
was for land mines & I'm not sure exactly why. They were however
capable of near highway speeds.

As for Nitrogen gas, as someone suggested, Nitrogen has the property
of very linear compressiion. As you double the pressure, the volume
halves. It's also used in off-road suspension systems.

Interesting. I wonder if this was to provide more mass to absorb the
overpressure aspect of the blast (should the mine be detonated). Anyone know
about this stuff?



I the army, (S.A.D.F.) we used to put water in our Unimog tires. This
was for land mines & I'm not sure exactly why. They were however
capable of near highway speeds.

Joe Here wrote in message . ..
This past Summer, took our 15 foot fiberglass on a long road trip
instead in the usual half mile to the marina. The tires are the small
4.80-8 utiltiy type tires, and needless to say, they overheated
badly.....
long story, but I'll be upgrading to a biger tire this Summer.

Here's my question. It seemed that the speed at which the load was
being carried created the heat. While pondering the trip home
(semi desperate and after a few beers) I considered filling the tires
with water (say 50%) in an attempt to dissipate the heat to the rims.

I never did this, but have pondered the the effects of water in a tire
at speed. Would the balance go for a bundle or would the water be
thrown evenly within the tire by the certifugal force?

I made the trip home by upping the pressure to 60 p.s.i. and by
driving slower.

Would water have helped of would I have been courting a disaster?

No, water would have just added to the mass. I have a boat with 8"
tires. I had 4.80-8's on it, told the guy at the tire shop that I
thought they got too hot, he put on 5.70-8's on, problem solved. You
can use the same wheels. They stay MUCH cooler. If you look, after
mounting one and blowing it up, and compare it to the 4.80, you'll see
a difference in heighth as well as width. It doesn't make as many
turns per mile as the smaller tire! The load range is greater, the
recommended tire pressure greater, and the contact patch greater.
Trust me, been there, done that.

"Joe Here" wrote in message
...

Here's my question. It seemed that the speed at which the load was
being carried created the heat.

It is the flexing of the sidewalls that creates most of the heat. The more
they flex, and the faster they flex, the more heat is generated.

A taller tire rotates slower, thus a given spot will flex less often, thus
it won't get as hot.

A stiffer tire won't flex as much. A tire with a higher load rating will be
stiffer. Tires are stiffer when properly inflated. Thus, a tire that is
not overloaded and is properly inflated shouldn't overheat.

While pondering the trip home
(semi desperate and after a few beers) I considered filling the tires
with water (say 50%) in an attempt to dissipate the heat to the rims.

As others have said, NO!
If nothing else, this will cause a major imbalance in the tire.

Rod