After a trailer tire blowout last year, I installed a remote monitoring
system that displays the trailer tire pressure on command, and alerts me
automatically if the pressure drops. I don't know how effective this
will be in avoiding tire problems, because it's possible tread
separation can occur even if the pressure is OK, but at least I won't be
driving on under-inflated tires.

There are several systems that one can choose from. I'm using
PressurePro, which is about $150 for the monitor and $50/tire for the
sensors. I also put them on my tow vehicle, so it was $650 for the two
trailer wheels and the six RV wheels. It was easy to install and seems
to work well.

Is anyone else using a trailer tire monitoring system? Has it helped you
avoid tire problems?

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly

* Updated! "Transponders in Sailplanes" http://tinyurl.com/y739x4
* New Jan '08 - sections on Mode S, TPAS, ADS-B, Flarm, more

* "A Guide to Self-launching Sailplane Operation" at www.motorglider.org

Eric Greenwell wrote:

> Is anyone else using a trailer tire monitoring system? Has it
> helped you
> avoid tire problems?

Hi Eric.

Can't comment directly on trailers. But my wife's Dodge Caliber
came with sensors as standard. For the first time that I can
recall she has actually requested that I put air in her tire.
Prior to that she has been known to drive for days with almost
zero air pressure.

I think the new sensors are great, on any application.
--
Regards,
Doug

** Posted from http://www.teranews.com **

On Jul 24, 10:47*am, Eric Greenwell > wrote:
> After a trailer tire blowout last year, I installed a remote monitoring
> system that displays the trailer tire pressure on command, and alerts me
> automatically if the pressure drops. I don't know how effective this
> will be in avoiding tire problems, because it's possible tread
> separation can occur even if the pressure is OK, but at least I won't be
> driving on under-inflated tires.
>
> There are several systems that one can choose from. I'm using
> PressurePro, which is about $150 for the monitor and $50/tire for the
> sensors. I also put them on my tow vehicle, so it was $650 for the two
> trailer wheels and the six RV wheels. It was easy to install and seems

Hi Eric,

I tried a similar system on my semi and it didn't work reliably, most
likely due to the 70 foot length of the unit. I switched to "Cat's
Eyes" which are devices with a clamshell covered by a plexiglass
dome. They mounted on the tire studs and connected by a braided hose
to the valve-stem. When the pressure was right, the lids were closed,
when it dropped, the clamshell opened proportionally. This was easy
to see at a glance. They were available in a range of preset
pressures and were much cheaper than the systems with electronic
senders, but you did have to get out of the truck. They were made by
an outfit called Link Manufacturing. There are systems for big trucks
that actually maintain correct pressure by means of a hub-mounted
centrifical pump, but they were new and unproven at the time.

My drivers had frequent tread separations and blowouts (about two a
month) in the 10 years before the Cat's Eyes" were installed but only
two blowouts in the 10 year period I owned the truck afterwards, both
due to striking debris in the road. We had no tread separation
incidents during this period. Given that, depending on position,
these tires cost anywhere from $ 200 to $ 400 each (Perhaps even more
now), the savings were considerable. Correct inflation, in addition to
preventing tire and associated vehicle damage, improves fuel economy
and prolongs the life of the axles and wheel bearings,

Oh yeah, did I mention safety? You haven't really lived 'til you've
tried to control a long, unstable vehicle that has suddenly developed
a mind of it's own. Blowouts often do that!

For anyone interested, Google "tire pressure monitor" and all sorts of
information pops up.

Ray Warshaw
1LK

PS: My current "tire pressure monitor system (tpms)" is an 18 inch
truck tire gauge, about $ 20 at most truck stops, which, when coupled
to an eyeball and used often, seems to do the job. At my present age,
I need to stop frequently anyway.

>
> Is anyone else using a trailer tire monitoring system? Has it helped you
> avoid tire problems?
>
> --
> Eric Greenwell - Washington State, USA
> * Change "netto" to "net" to email me directly
>
> * Updated! "Transponders in Sailplanes"http://tinyurl.com/y739x4
> * * * New Jan '08 - sections on Mode S, TPAS, ADS-B, Flarm, more
>
> * "A Guide to Self-launching Sailplane Operation" atwww.motorglider.org

Raphael Warshaw wrote:
> On Jul 24, 10:47 am, Eric Greenwell > wrote:
>> After a trailer tire blowout last year, I installed a remote monitoring
>> system that displays the trailer tire pressure on command, and alerts me
>> automatically if the pressure drops. I don't know how effective this
>> will be in avoiding tire problems, because it's possible tread
>> separation can occur even if the pressure is OK, but at least I won't be
>> driving on under-inflated tires.
>>
>> There are several systems that one can choose from. I'm using
>> PressurePro, which is about $150 for the monitor and $50/tire for the
>> sensors. I also put them on my tow vehicle, so it was $650 for the two
>> trailer wheels and the six RV wheels. It was easy to install and seems
>
> Hi Eric,
>
> I tried a similar system on my semi and it didn't work reliably, most
> likely due to the 70 foot length of the unit.

snip

> My drivers had frequent tread separations and blowouts (about two a
> month) in the 10 years before the Cat's Eyes" were installed but only
> two blowouts in the 10 year period I owned the truck afterwards,

It sounds like you've taken care of your problem.

> PS: My current "tire pressure monitor system (tpms)" is an 18 inch
> truck tire gauge, about $ 20 at most truck stops, which, when coupled
> to an eyeball and used often, seems to do the job. At my present age,
> I need to stop frequently anyway.

I went to the remote monitoring after several flats on the motorhome,
despite obsesssive pressure checking of the tires.

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly

* Updated! "Transponders in Sailplanes" http://tinyurl.com/y739x4
* New Jan '08 - sections on Mode S, TPAS, ADS-B, Flarm, more

* "A Guide to Self-launching Sailplane Operation" at www.motorglider.org

On Jul 24, 7:05*pm, Eric Greenwell > wrote:
> Raphael Warshaw wrote:
> > On Jul 24, 10:47 am, Eric Greenwell > wrote:
> >> After a trailer tire blowout last year, I installed a remote monitoring
> >> system that displays the trailer tire pressure on command, and alerts me
> >> automatically if the pressure drops. I don't know how effective this
> >> will be in avoiding tire problems, because it's possible tread
> >> separation can occur even if the pressure is OK, but at least I won't be
> >> driving on under-inflated tires.
>
> >> There are several systems that one can choose from. I'm using
> >> PressurePro, which is about $150 for the monitor and $50/tire for the
> >> sensors. I also put them on my tow vehicle, so it was $650 for the two
> >> trailer wheels and the six RV wheels. It was easy to install and seems
>
> > Hi Eric,
>
> > I tried a similar system on my semi and it didn't work reliably, most
> > likely due to the 70 foot length of the unit. *
>
> snip
>
> > My drivers had frequent tread separations and blowouts (about two a
> > month) in the 10 years before the Cat's Eyes" were installed but only
> > two blowouts in the 10 year period I owned the truck afterwards,
>
> It sounds like you've taken care of your problem.
>
> > PS: My current "tire pressure monitor system (tpms)" is an 18 inch
> > truck tire gauge, about $ 20 at most truck stops, which, when coupled
> > to an eyeball and used often, seems to do the job. *At my present age,
> > I need to stop frequently anyway.
>
> I went to the remote monitoring after several flats on the motorhome,
> despite obsesssive pressure checking of the tires.
>
> --
> Eric Greenwell - Washington State, USA
> * Change "netto" to "net" to email me directly
>
> * Updated! "Transponders in Sailplanes"http://tinyurl.com/y739x4
> * * * New Jan '08 - sections on Mode S, TPAS, ADS-B, Flarm, more
>
> * "A Guide to Self-launching Sailplane Operation" atwww.motorglider.org- Hide quoted text -
>
> - Show quoted text -

Terrific Idea. I check my trailer hubs and tire surfaces at each pit
stop along the way. I find that a $4.95 tire pressure guage from
Walmart works great. Be sure to follow your tire manufacturer's
recommendation. 50 psi for my Goodywar Marathon Radials. Run them on
my boats and the glider trailer. Also, be very aware and critical of
the sounds and feel of the trailer. Unusual vibrations, noises and
handling almost always foretells tire failuer.

On Jul 24, 4:05*pm, Eric Greenwell > wrote:
> Raphael Warshaw wrote:
> > On Jul 24, 10:47 am, Eric Greenwell > wrote:
> >> After a trailer tire blowout last year, I installed a remote monitoring
> >> system that displays the trailer tire pressure on command, and alerts me
> >> automatically if the pressure drops. I don't know how effective this
> >> will be in avoiding tire problems, because it's possible tread
> >> separation can occur even if the pressure is OK, but at least I won't be
> >> driving on under-inflated tires.
>
> >> There are several systems that one can choose from. I'm using
> >> PressurePro, which is about $150 for the monitor and $50/tire for the
> >> sensors. I also put them on my tow vehicle, so it was $650 for the two
> >> trailer wheels and the six RV wheels. It was easy to install and seems
>
> > Hi Eric,
>
> > I tried a similar system on my semi and it didn't work reliably, most
> > likely due to the 70 foot length of the unit. *
>
> snip
>
> > My drivers had frequent tread separations and blowouts (about two a
> > month) in the 10 years before the Cat's Eyes" were installed but only
> > two blowouts in the 10 year period I owned the truck afterwards,
>
> It sounds like you've taken care of your problem.
>
> > PS: My current "tire pressure monitor system (tpms)" is an 18 inch
> > truck tire gauge, about $ 20 at most truck stops, which, when coupled
> > to an eyeball and used often, seems to do the job. *At my present age,
> > I need to stop frequently anyway.
>
> I went to the remote monitoring after several flats on the motorhome,
> despite obsesssive pressure checking of the tires.
>
> --
> Eric Greenwell - Washington State, USA
> * Change "netto" to "net" to email me directly
>
> * Updated! "Transponders in Sailplanes"http://tinyurl.com/y739x4
> * * * New Jan '08 - sections on Mode S, TPAS, ADS-B, Flarm, more
>
> * "A Guide to Self-launching Sailplane Operation" atwww.motorglider.org- Hide quoted text -
>
> - Show quoted text -

The Cat's Eyes we used made it simple for my drivers to look at tire
pressure. They were no help when the vehicle was moving. Several of
them told me they could estimate pressure to a few pounds by thumping
the tires with a "tire thumper", a device that looked like a Billy
Club. When I challenged them, they couldn't come w/in 20 psi.

I wonder if the problem you're having is due to heat buildup. If the
tire pressure is ok when you start, still ok when you arrive where
you're going and stilll ok the following morning, you've pretty much
ruled out loss of air. Does your motorhome allow decent airflow
around the tires? Most of the ones I've looked at cover more than
half the tire with the bodywork, particularly the rear duals.

Ray Warshaw

Raphael Warshaw wrote:

>> I went to the remote monitoring after several flats on the motorhome,
>> despite obsesssive pressure checking of the tires.
>
> I wonder if the problem you're having is due to heat buildup.

I don't think so. One was due to a bolt through the tread, another a
tear in the sidewall, and two from faulty valve stems. These were all
rear tires, on duals, and I never felt any handling changes. By luck,
only the one with the tear had to be replaced.

I often check the tire temperature right after stopping just by placing
a hand on them. It's a good way to see if any tire is running
significantly hotter than the others. It's probably not a useful
practice, now that I have remote pressure sensors, but you still have to
visually examine the tires, regardless of how you measure the
temperature. Bulges, partial separation, uneven wear, nails, etc, can
often only be caught by eye.

I've had the most tread problems with my trailer. I've removed one tire
because it was wearing very oddly, two tires because they developed a
bulge from partial tread separation, one tire because the steel belt
showed through for a few inches on one edge, and one because the tread
separated completely, taking the fender with it. This is over
140-150,000 miles of towing in a 10 year period.

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly

* Updated! "Transponders in Sailplanes" http://tinyurl.com/y739x4
* New Jan '08 - sections on Mode S, TPAS, ADS-B, Flarm, more

* "A Guide to Self-launching Sailplane Operation" at www.motorglider.org

> Be sure to follow your tire manufacturer's
> recommendation. *50 psi for my Goodywar Marathon Radials. *Run them on
> my boats and the glider trailer. *Also, be very aware and critical of
> the sounds and feel of the trailer. *Unusual vibrations, noises and
> handling almost always foretells tire failuer.- Hide quoted text -
>
> - Show quoted text -

My understanding is that the correct tire pressure is recommended by
the vehicle manufacturer and not the tire manufacturer. On a car, the
correct tire pressure can be found in the operating manual or on the
vehicle identification placard located in the driver's side door
frame. The tire pressure on the tire sidewall is the pressure to
carry the max load that the tire can handle. Following this
reasoning, the correct tire pressure on the trailer should be the one
the trailer manufacturer recommends even if the tire has a higher
pressure listed on the sidewall. I checked this out with my tire
store and they confirmed this. I have new ST rated tires that can
handle 50PSI, but the store recommended 35 PSI. The trailer is
noticeably more stable than the old P-rated tires that were on the
trailer when I bought it.

James D'Andrea wrote:
>> Be sure to follow your tire manufacturer's
>> recommendation. 50 psi for my Goodywar Marathon Radials. Run them on
>> my boats and the glider trailer. Also, be very aware and critical of
>> the sounds and feel of the trailer. Unusual vibrations, noises and
>> handling almost always foretells tire failuer.- Hide quoted text -
>>
>> - Show quoted text -
>
> My understanding is that the correct tire pressure is recommended by
> the vehicle manufacturer and not the tire manufacturer. On a car, the
> correct tire pressure can be found in the operating manual or on the
> vehicle identification placard located in the driver's side door
> frame. The tire pressure on the tire sidewall is the pressure to
> carry the max load that the tire can handle. Following this
> reasoning, the correct tire pressure on the trailer should be the one
> the trailer manufacturer recommends even if the tire has a higher
> pressure listed on the sidewall.

This is a sensible approach to setting the tire pressure, as long as you
are using the tire specified by the trailer manufacturer, AND you are
loading the trailer to the same weight. People sometimes have problems
getting the identical size (or getting the quality they want), or they
didn't like how the original size performed (stability, speed rating,
longevity), so they end up with a different type or size of tire.

Following the tire manufacturer's recommendations does not mean using
the max pressure listed on the sidewall, but using the inflation
pressure from their load tables. Even that pressure can be properly
exceeded in some circumstances; e.g., ST tires can be run be used over
their nominal 65 mph rating (up to 75 mph) by increasing the pressure
another 10 psi (assuming the wheel and tire are rated for the higher
pressure).

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly

* Updated! "Transponders in Sailplanes" http://tinyurl.com/y739x4
* New Jan '08 - sections on Mode S, TPAS, ADS-B, Flarm, more

* "A Guide to Self-launching Sailplane Operation" at www.motorglider.org

On Thu, 24 Jul 2008 14:09:37 GMT-4, (Doug
Hoffman) wrote:

>Eric Greenwell wrote:
>
>> Is anyone else using a trailer tire monitoring system? Has it
>> helped you
>> avoid tire problems?
>
>Hi Eric.
>
>Can't comment directly on trailers. But my wife's Dodge Caliber
>came with sensors as standard. For the first time that I can
>recall she has actually requested that I put air in her tire.
>Prior to that she has been known to drive for days with almost
>zero air pressure.
>
>I think the new sensors are great, on any application.

They are, but it might be an expensive addition to a trailer. The tire
pressure warning system on cars works by comparing the rotational
speeds of all four wheels, and alarming when one wheel's speed is
substantially below the mean. Not too many customers would pay for
speed sensors on all four wheels just for this purpose -- but if your
car has antilock brakes it already has those sensors, and the tire
pressure logic is a trivial add-on.

rj

On Jul 24, 10:47*am, Eric Greenwell > wrote:
> After a trailer tire blowout last year, I installed a remote monitoring
> system that displays the trailer tire pressure on command, and alerts me
> automatically if the pressure drops. I don't know how effective this
> will be in avoiding tire problems, because it's possible tread
> separation can occur even if the pressure is OK, but at least I won't be
> driving on under-inflated tires.
>
> There are several systems that one can choose from. I'm using
> PressurePro, which is about $150 for the monitor and $50/tire for the
> sensors. I also put them on my tow vehicle, so it was $650 for the two
> trailer wheels and the six RV wheels. It was easy to install and seems
> to work well.
>
> Is anyone else using a trailer tire monitoring system? Has it helped you
> avoid tire problems?
>
> --
> Eric Greenwell - Washington State, USA
> * Change "netto" to "net" to email me directly
>
> * Updated! "Transponders in Sailplanes"http://tinyurl.com/y739x4
> * * * New Jan '08 - sections on Mode S, TPAS, ADS-B, Flarm, more
>
> * "A Guide to Self-launching Sailplane Operation" atwww.motorglider.org

Trailer tires rarely fail because of improper inflation. This will
affect tire life, but trailer tires rarely make it to the mileage life
limit because of low usage. Trailer tires fail because of age (unless
you drive over a nail!). Replace your trailer tires every 4 years,
regardless of what they look like, and you will be fine. Tires rot
from the insides by oxidation of the rubber with air, unless you fill
with nitrogen. Checking the tire pressure once before hitting the road
is often enough.

Tom

Ralph Jones wrote:
> O
>> Can't comment directly on trailers. But my wife's Dodge Caliber
>> came with sensors as standard. For the first time that I can
>> recall she has actually requested that I put air in her tire.
>> Prior to that she has been known to drive for days with almost
>> zero air pressure.
>>
>> I think the new sensors are great, on any application.
>
> They are, but it might be an expensive addition to a trailer. The tire
> pressure warning system on cars works by comparing the rotational
> speeds of all four wheels, and alarming when one wheel's speed is
> substantially below the mean. Not too many customers would pay for
> speed sensors on all four wheels just for this purpose -- but if your
> car has antilock brakes it already has those sensors, and the tire
> pressure logic is a trivial add-on.

I believe most cars use actual pressure sensors, rather than the
"indirect" rotational speed method, but I don't have any documentation
for that. The pressure information from the sensor is transmitted
wirelessly. That is how the system I use works. The cost is about $200
for the monitor, and $50 a wheel for the sensor. There are cheaper
systems if you only want to monitor your trailer, but I wanted to
monitor the six motorhome tires in addition to the trailer tires.

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly

* Updated! "Transponders in Sailplanes" http://tinyurl.com/y739x4
* New Jan '08 - sections on Mode S, TPAS, ADS-B, Flarm, more

* "A Guide to Self-launching Sailplane Operation" at www.motorglider.org