Goodyear tires - BAD

[trekkersmith1]

Roger,
In the senario Don described, YES, inflating to the max pressure is
overinflated. Correct pressure is determined based on the load the tire is
supporting, and anything above that is overinflating. Most of the tire makers
(Goodyear, Michelin, etc.) have a guide to determine how much pressure to
inflate each tire to. To use the guide, you need to know the weights at each
tire position and the tire size. There's more to it than this, but they
generally have a buried footnote advising that under certain conditions you can
carry 5-10 psi more than the chart calls for.

The proper pressure is thus obtained from a chart, not from what's on the
sidewall of the tire. The amount on the sidewall is max pressure to carry max
weight for the design of the tire. There's also a psi rating for your rims. If
your tire can be inflated to 110 psi, but the rim is only rated for 100 psi,
then 100 psi is your limit. For other folks here who don't understand all this,
if you happen to be going to the FMCA Convention in a couple weeks in Bowling
Green (Ohio, not Kentucky), there is a seminar (maybe several) on this topic,
and they will weigh your coach so you get those important weights, as well as a
report giving you the proper pressures for each axle.
Gary
SOB
--- In WanderlodgeForum@yahoogroups.com, RWW wrote:
>
> Is a tire inflated to it's max pressure 'overinflated'??
>
> Roger Webb
> 91 WL
> Cedar Rapids, IA
>
> RWW
>
> On Jul 3, 2009, at 11:00 AM, "Don Bradner"
> wrote:
>
> >
> >
> > A quote from one of many articles on the topic: "An overinflated
> > tire is stiff and unyielding and the size of its footprint in
> > contact with the road is reduced. If a vehicle's tires are
> > overinflated by 6 psi, they could be damaged more easily when
> > encountering potholes or debris in the road, as well as experience
> > irregular tread wear."
> >
> > The 6 psi was in reference to a car tire - equivalent to something
> > like 20-25psi in our big tires.
> >
> > Since the proper inflation of a 315/80R22.5 could be as low as 85
> > (typical tag axle) or 90 (typical drivers), going to 130 is 40 to 45
> > lbs too high!
> >
> > On 7/3/2009 at 7:11 AM RWW wrote:
> >
> > >This statement confuses me ...
> > >
> > >... there are those who just go to the max. That would probably be
> > >over the proper (way over for some tire positions) level.
> > >
> > >I have always believed that as tire pressure is increased (up to the
> > >max PSI) you increase load capacity and decrease ride quality. In
> > >other words, having your tires above the PSI 'needed' for the weight
> > >at that position (but not above the max) will NOT increase the
> > >probability of tire failure. However, you do sacrifice ride quality.
> > >
> > >Roger Webb
> > >91 WL
> > >Cedar Rapids, IA
> > >
> > >
> > >On Jul 2, 2009, at 11:33 PM, "Don Bradner"
> >
> > >wrote:
> > >
> > >> of 130 psi, and there are those who just go to the max. That would
> > >> probably be over the proper (way over for some tire positions)
> > level.
> >
> >
>