2009 Ram 1500 width

Ventilated Seats — If Equipped
Located in the seat cushion and seatback are small fans
that draw the air from around the occupant and exhaust
it underneath the seat and into the passenger compart-
ment. The fans draw this air across the surface of the seat
using air ducts and fine perforations in the covering to
help keep the driver cooler in higher ambient tempera-
tures.
The ventilated seat switches are located in the switch
bank in the center stack of the instrument panel, just
below the climate controls. The fans operate at two
speeds, High and Low.Press the switch once to choose High,
press it a second time to choose Low.
Pressing the switch a third time will
turn the ventilated seat Off. When
High speed is selected both lights on the switch will be illuminated. When Low speed is
selected one light will be illuminated.
NOTE:
•The engine must be running for the ventilated seats to
operate.
•The drivers ventilated seat can be programmed to
come on during a remote start. Refer to “Remote
Starting System — If Equipped” in Section 2 for
further information.
40-20-40 Front Bench Seat — If Equipped
The seat is divided into three segments. The outboard
seat portions are each 40% of the total width of the seat.
The back of the center portion (20%) easily folds down to
provide an armrest/center storage compartment (if
equipped).
140 UNDERSTANDING THE FEATURES OF YOUR VEHICLE

NOTE:
•P (Passenger) - Metric tire sizing is based on U.S.
design standards. P-Metric tires have the letter “P”
molded into the sidewall preceding the size designa-
tion. Example: P215/65R15 95H.
•European-Metric tire sizing is based on European
design standards. Tires designed to this standard have
the tire size molded into the sidewall beginning with
the section width. The letterPis absent from this tire
size designation. Example: 215/65R15 96H.
•LT (Light Truck) - Metric tire sizing is based on U.S.
design standards. The size designation for LT-Metric tires is the same as for P-Metric tires except for the
letters “LT” that are molded into the sidewall preced-
ing the size designation. Example: LT235/85R16.
•Temporary spare tires are high-pressure compact
spares designed for temporary emergency use only.
Tires designed to this standard have the letter “T”
molded into the sidewall preceding the size designa-
tion. Example: T145/80D18 103M.
•High flotation tire sizing is based on U.S. design
standards and it begins with the tire diameter molded
into the sidewall. Example: 31x10.5 R15 LT.5
STARTING AND OPERATING 363

Tire Sizing Chart
EXAMPLE:
Size Designation:
P= Passenger car tire size based on U.S. design standards
\b....blank....\b = Passenger car tire based on European design standards
LT = Light truck tire based on U.S. design standards
T = Temporary spare tire
31 = Overall diameter in inches (in)
215 = Section width in millimeters (mm)
65 = Aspect ratio in percent (%)
— Ratio of section height to section width of tire
10.5 = Section width in inches (in)
R = Construction code
—R means radial construction
—D means diagonal or bias construction
15 = Rim diameter in inches (in)
364 STARTING AND OPERATING

WARNING!
It is important that you do not exceed the maximum
front or rear GAWR. A dangerous driving condition
can result if either rating is exceeded. You could lose
control of the vehicle and have an accident.
Tongue Weight (TW)
The tongue weight is the downward force exerted on the
hitch ball by the trailer. In most cases it should not be less
than 10% or more than 15% of the trailer load. You must
consider this as part of the load on your vehicle.
Frontal Area
The frontal area is the maximum height and maximum
width of the front of a trailer.
Trailer Sway Control
The trailer sway control is a telescoping link that can be
installed between the hitch receiver and the trailer tonguethat typically provides adjustable friction associated with
the telescoping motion to dampen any unwanted trailer
swaying motions while traveling.
Weight-Carrying Hitch
A weight-carrying hitch supports the trailer tongue
weight, just as if it were luggage located at a hitch ball or
some other connecting point of the truck. These kind of
hitches are the most popular on the market today and
they’re commonly used to tow small- and medium-sized
trailers.
Weight-Distributing Hitch
A weight-distributing system works by applying lever-
age through spring (load) bars. They are typically used
for heavier loads to distribute trailer tongue weight to the
tow vehicle’s front axle and the trailer axle(s). When used
in accordance with the manufacturer’s directions, it pro-
vides for a more level ride, offering more consistent
steering and brake control, thereby enhancing towing
400 STARTING AND OPERATING