RE: [VAL] Back to steel tire stems and the why's and what-for

["David Tidmore" <dtidmore@xxxxxxx>]

Don,
I am not sure what A/S originally installed on your rig.  I do know that on
all the new 28 foot and greater models as well as the 19' Bambi, they use
the ST225/75R15 D rated Goodyear Marathon.  These tires at 65PSI cold
inflation pressure can carry a maximum load per tire of 2540#s.  At 60PSI,
each can carry 2380, at 55PSI, each can carry 2270 and at 50PSI each can
carry 2150.  As you can see, with your rig, you most likely would not
require the full 65PSI, BUT it is interesting to note that A/S recommends
65PSI for on the current 19' and 28/31 ft models (not sure on the 34ft) even
though the loads on the tandem rigs might indicate a lower pressure.  On the
Bambi, at full load, the tires running at 65PSI only have a 250 pound per
tire excess capacity over the actual load per tire, so if a tire should drop
to 60PSI, the tire would still be within its load range (but just barely).
I suspect that A/S is recommending 65PSI on the other rigs so that if you
have a flat and have to tow for a distance on 3 wheels you will have the
maximum load capacity of the remaining tire.

david