My work truck came with snows which have been on it pretty much since I got
it and were old then. Now the fronts were more of an all-season and I blew
one at speed on the highway for no apparent reason after only a few hundred
miles.
The rears, one finally developed a slow leak at the bead over the winter,
and I threw on a spare that I had handy that was a size smaller. I finally
got rid of that one because it developed a crack all the way around the
bead, with a light truck tire that is noisy but looks good. But I ran it so
long on the too-small tire I wore the other snow through to the cord in one
spot and had no idea until it too, got a leak. I need to go out and find a
good pair of tires in the junkyard for it. I was supposed to be driving the
replacement truck by now, but haven't had time to do the trans swap it
needs, or I wouldn't keep patching this thing up with bailing wire.
But I have run old tires off and on for a long time. Old bias-plies with
tubes in them you can get away with more abuse. Radials will come apart and
make a mess when they get old. I've even read of tires that exploded just
sitting on a car. I accidentally overpressured an old bias ply when I
wanted a spare for the Hudson I bought out of a junkyard and flat-towed
home - it went boom, scared me, but no damage inside the car where I'd set
it.
I'd say if you drive the car little, run bias plies with tubes -
Bill K.
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