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Tire pressures for high speed operation – Dodge 2014 Challenger_SRT - Owner Manual User Manual

Page 363

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CAUTION!

After inspecting or adjusting the tire pressure, al-
ways reinstall the valve stem cap. This will prevent
moisture and dirt from entering the valve stem,
which could damage the valve stem.

Inflation pressures specified on the placard are always

“cold tire inflation pressure.” Cold tire inflation pressure

is defined as the tire pressure after the vehicle has not

been driven for at least three hours, or driven less than 1

mile (1.6 km) after a three hour period. The cold tire

inflation pressure must not exceed the maximum infla-

tion pressure molded into the tire sidewall.
Check tire pressures more often if subject to a wide range

of outdoor temperatures, as tire pressures vary with

temperature changes.

Tire pressures change by approximately 1 psi (7 kPa) per

12°F (7°C) of air temperature change. Keep this in mind

when checking tire pressure inside a garage, especially in

the winter.
Example: If garage temperature = 68°F (20°C) and the

outside temperature = 32°F (0°C) then the cold tire

inflation pressure should be increased by 3 psi (21 kPa),

which equals 1 psi (7 kPa) for every 12°F (7°C) for this

outside temperature condition.
Tire pressure may increase from 2 to 6 psi (13 to 40 kPa)

during operation. DO NOT reduce this normal pressure

build up or your tire pressure will be too low.
Tire Pressures For High Speed Operation
The manufacturer advocates driving at safe speeds and

within posted speed limits. Where speed limits or condi-

tions are such that the vehicle can be driven at high

speeds, maintaining correct tire inflation pressure is very

important. Increased tire pressure and reduced vehicle

362 STARTING AND OPERATING