I am specifically looking at the difference between tires "meant" (or
designed for) light trucks with a P series designation and comparable
The exact size is P225/75R15. Doing tire searches at places like
Active Green+Ross and TireRack.com has shown more truck tires than car
tires, and I was wondering if using those truck tires would cause a
car to mishandle.
Quid quid latine dictum sit altum videtur.
(That which is said in Latin sounds profound.)
Higher load rating is a result of heftier carcass construction. You can
expect that size-for-size the 'truck' tires are heavier, increasing unsprung
weight, and adversely effecting ride and handling. They also often have a
'blockier' tread pattern, better for poor condition grip, but almost always
noisier. The real measure of load rating is the "load index" on the
tirewall (P215/65 R15 89H ----> the '89' is the load index --> tires.com has
the load charts on their site)
btw. the 'P' designation means 'Passenger Car' I believe, true truck tires
will be labelled 'LT' for 'Light Truck'
Not exactly true as far as the load rating goes. I just bought a set of
P255/70/15' s with a load rating of 108 (2100 lbs) Two nylon, and two steel
ply construction. The comparable LT tire (6ply) had a load rating of 109.
Since the C1500 that I am driving will never be able to carry a load that
the tires are rated for...the P255's were the better choice for my buck.
They handle and ride just fine, and the raised white letters go with the
look of the truck.
Does the recommendation from Consumer Reports concerning the use of
grippy tires in trucks have any foundation? According to them, and I
believe that Ford warns about the same issue, a grippy tire will make
a truck more prone to rolling over. The rationale is that LT tires
would skid in the limit.
OK, ANY vehicle driven improperly will roll over. Some that are more top
heavy, ,such as the Ford explorer will have a higher chance of rolling if
the driver puts the vehicle in a position (sideways) to roll. Jeep C-J 5
were notorious for this. Short wheelbase, high center of gravity. Ford's
problem fell between the tire manufacturer wanting one air pressure and Ford
putting a differnent value on thier placard. The tires came apart at a
higher rate of speed in a turn. So Ford would say anything not to get thier
ass sued again.
My truck, the C1500 sits very low to the ground as compared to the Explorer
OR any 4WD. It is only a V6 and will never see the other side of 75-80
MPH, no less haul what the tires are rated. I bought a quality name tire,
and not one of those econo no name tires.
So while being very happy with my purchase, I have no intentions whatsoever
of buying "truck" tires....ever... for this truck.
After all it is totally up to what YOU personally feel comfortable with
having on your ride. Some guys like Fruit of the Loom, and some like Hanes.
Either way....BOTH will end up with skid marks!!!
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