Steve,
The manual refers to the old bias-belt tires, and you most likely run
radials. The pressures for optimum performance are quite different.
However, your use is the most critical item in correct pressure, as
Larry stated.
Higher pressures give less rolling resistance, better gas mileage, worse
grip, harsher ride and lower "g" capability before sliding or spinning rubber.
Lower pressures, to a point, increase traction. They also increase
sidewall flexibility, which is good for grip - to a point, when it
starts getting "floppy", like bias belt does.
Higher pressures give better tire life, to a point. Probably it would be
more accurate to state that too low a pressure reduces tire life, as
well as increases tire tread temperatures. Tires are designed to present
a "flat" footprint for optimal traction at a specific vehicle weight
load, as well.
Cut to fit, hammer to match. Whatever suits your uses the best.
--
____________________________
Steve Laifman
Editor
<http://www.TigersUnited.com>
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