Acura RLX Sport Hybrid 2020 Owner's Manual page 77

MAINTENANCE
n Tire Chains
Install tire chains on the front tires only. Because your vehicle has limited
tire clearance, we strongly recommend using the following chains:
Cable type: SCC Radial Chain SC1040
Mount chains as tightly as you can and make sure that they do not touch
the brake lines or suspension.
Traction devices that are the wrong size or improperly installed can
damage your vehicle's brake lines, suspension, body, and wheels. Stop
driving if they are hitting any part of the vehicle.
Using the wrong chains, or not properly installing chains, can damage the
brake lines and cause a crash in which you can be seriously injured or
killed.
Follow all instructions in this guide regarding the selection and use of tire
chains.
Tire Labeling
The tires that came on your vehicle have a number of markings. Those you
should be aware of are described below.
Here is an example of what each marking means:
P245/40R19 98W
• P: tire type (passenger vehicle)
• 245: tire width in millimeters
• 40: aspect ratio (tire section height as a
percentage of its width)
• R: tire construction code (radial)
• 19: rim diameter in inches
• 98: load index (code indicating
maximum load tire can carry)
• W: speed symbol (code indicating maximum speed rating)
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n Tire Identification Number (TIN)
The tire identification number (TIN) is
a group of numbers and letters that
look like the following example. The
TIN is located on the sidewall of the
tire.
Glossary of Tire Terminology
n
Cold Tire Pressure – The tire air pressure when the vehicle has been
parked for at least three hours or driven less than 1 mile (1.6 km).
Load Rating – The maximum load that a tire is rated to carry for a given
inflation pressure.
Maximum Inflation Pressure – The maximum tire air pressure that the tire
can hold.
Maximum Load Rating – The load rating for a tire at the maximum
permissible inflation pressure for that tire.
Recommended Inflation Pressure – The cold tire inflation pressure
recommended by the manufacturer.
Treadwear Indicators (TWI) – The projections within the principal grooves
designed to give a visual indication of the degrees of wear of the tread.
DOT Tire Quality Grading
The tires on your vehicle meet all U.S. Federal Safety Requirements. All tires
are also graded for treadwear, traction, and temperature performance
according to Department of Transportation (DOT) standards. These gradings
are explained below.
Uniform Tire Quality Grading
n
Quality grades can be found where applicable on the tire sidewall between
tread shoulder and maximum section width.
For example:
Treadwear 200
Traction AA
MAINTENANCE
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