Continental CrossContact (All-Season, M+S)

Very little impacts the overall performance your Land Rover more than the tires that are located at all four corners. No matter how much technology, power, torque, or electronic wizardry Land Rover tosses at its vehicles, it all must be translated to the terrain via the tires. Hence, tires impact a large number of factors beyond basic on and off-road traction. These factors include, but are not limited to, ride quality, fuel economy, vehicle stability, ground clearance, and payload capacity.

Below is our example tire. It is the standard original equipment (OE) 19-inch tire found on the 2012 Range Rover Evoque. The Continental CrossContact tire found on the Evoque is a low rolling resistance, all-season tire with a street price of $240.00 to $260.00. You can click here to read more about the 2012 Evoque’s tires and wheels.

Manufacturer: Continental
Model:
CrossContact (All-Season, M+S)
          M+S (Mud & Snow)
Size:
235/55R19
Load Rating:
105
Speed Rating:
V
Uniform Tire Quality Grade (UTQG):
420
Traction Grade:
A
Temperature Grade:
A

What the Tire Markings Mean

Tire Size Prefix Letters

P – The “P” preceding the tire size indicates the tire is intended for passenger vehicle use, which includes most SUVs and light trucks rated at 1/2-ton and lighter. You’ll note that the Continental CrossContact tire found on the Evoque does not include the “P.” This lack of a prefix letter indicates the tire is also a metric-sized tire and is dimensionally the same as a a tire marked with a “P” but may have different load characteristics that similarly sized tires marked with the “P.”

LT – An “LT” prefix indicates the tire is designed for light trucks rated up to 1 ton.

C – A “C” prefix indicates the tire is intended for commercial vehicles such as cargo vans and delivery trucks. These tires typically feature comparatively high load ratings.

ST – “ST” tires are intended for use on trailers.

T – A “T” indicates the tire is a temporary or “space saver” spare.

Tire Size Numbers

The size of our sample tire is 235/55R19.

235 – 235 is the width of the tire in millimeters. A 235mm width translates into 9.25 inches.

55 – 55 is the ratio of the tire’s height vs. width. The height of the tire is 55% of its width, which gives our sample tire a height of just over 5 inches.

R – The “R” indicates radial construction. Radial construction accounts for nearly every passenger vehicle tire sold today.

19 – The last number in the size indicates the wheel diameter for which the tire is designed. The Range Rover Evoque has available 19 and 20-inch tires.

Load and Speed Ratings

The load index of the Evoque’s Continental tires is 105. The speed rating is “V.” The load index can be cross-referenced to the load rating chart shown below. It indicates the maximum load the tire can safely accommodate. The speed rating indicates the maximum safe operating speed of the tire. It can be cross-referenced and converted into MPH via the chart below.

105 – The Evoque’s Continental load index is 105, which translates into 2,039 pounds.

V – A “V” speed rating indicates a top speed of 149 MPH.

Tire Load Index Chart

All capacities are in pounds.

Index Capacity Index Capacity
71 761 91 1,356
72 783 92 1,389
73 805 93 1,433
74 827 94 1,477
75 853 95 1,521
76 882 96 1,565
77 908 97 1,609
78 937 98 1,653
79 963 99 1,709
80 992 100 1,764
81 1,019 101 1,819
82 1,047 102 1,874
83 1,074 103 1,929
84 1,102 104 1,984
85 1,135 105 2,039
86 1,168 106 2,094
87 1,201 107 2,149
88 1,235 108 2,205
89 1,279 109 2,271
90 1,323 110 2,337
       

Tire Speed Rating Chart

L 75 MPH
M 81 MPH
N 87 MPH
P 93 MPH
Q 99 MPH
R 106 MPH
S 112 MPH
T 118 MPH
U 124 MPH
H 130 MPH
V 149 MPH
W 168 MPH
Y 186 MPH
   

A tire marked with a “Z” indicates that the tire is capable of speeds in excess of 149 MPH. The advent of the “W” and “Y” ratings came about due to the need for tires which were able to accommodate the extreme high top speeds of supercars.

Tire Air Pressure

The maximum tire air pressure number on the tire itself indicates the maximum pounds per square inch (PSI) of tire pressure. Recommended tire PSI numbers can be found on a label on the door frame inside the driver’s door. Under most circumstances, the numbers shown on the vehicle’s decal should be used to determine the proper level of inflation.

Additional Tire Size Ratings

Treadwear Grade

Uniform Tire Quality Grade (UTQG) standards were developed by the National Highway Traffic Safety Administration (NHTSA) in an attempt to make tread life easily comparable across different tires. Unfortunately, the tests are inconclusive and open to interpretation by the tire manufacturer.

The baseline UTQG number is 100. A tire with a UTQG rating of 200 should last twice as long as a tire rated at 100; 300, three times as long; 400, four times as long; etc. Our example Evoque tire has a UTQG rating of 420.

Traction Grade

The traction grade indicates the tire’s ability to stop a vehicle on wet concrete or asphalt. The ratings take shape in the form of a letter grade: C, B, A, and AA. The C grade is the lowest and the AA grade is the highest. Our example Continental tire is rated “A.”

Temperature Grade

The temperature grade indicates how well the tire can handle and dissipate heat. As with traction, the temperature rating is rendered as a letter grade. The three grades are C, B, and A. Like the traction grade, a “C” grade is the lowest rating. The Evoque’s Continental tire is rated at “A.”

2012 Range Rover Evoque 20-Inch Tire Detail



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October 15, 2011

RoverGuide

Articles, Buying & Ownership, Land Rover Models, Range Rover Evoque

Range Rover Evoque, Tires

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