Tire Type
Tire Types are tire categories describing different attributes and tire performance levels as determined by the respective Tire Manufacturer's definitions.
Tire Manufacturer's Tread Warranty
All tire manufacturers provide a basic limited warranty that covers workmanship and materials for a specific time frame or mileage limit.
In addition to the Tire Manufacturers basic limited warranty, this Tire Manufacturer offers a supplemental limited mileage/tread warranty that applies to this tire. If the tire fails to meet these tread-wear limits, the manufacturer will replace the tire with an equivalent new tire.
See the Tire Manufacturer’s warranty information for details, restrictions and exclusions by selecting the tire details.
About Warranties...
Warranties are governed by both state and federal laws and regulations. Everyone should have a basic understanding of warranty coverage, as well as their obligations under the law and under the rules of good business.
Speed Rating
A letter symbol that follows the load index indicates the tire’s speed rating. The speed rating denotes the speed at which a tire is designed to be driven for extended periods of time under a standard condition of load and inflation pressure. The tires on your vehicle may operate at different conditions for load and inflation pressure. These speed ratings may need to be adjusted for the difference in conditions. The ratings range from 81 mph (130 km/h) to 186 mph (299 km/h). These ratings are listed in the following chart.
Note: you may not find this information on all tires because it is not required by law.
| Q | 99 mph | H | 130 mph |
| R | 106 mph | V | 149 mph |
| S | 112 mph | W | 168 mph* |
| T | 118 mph | Y | 186 mph* |
| U | 124 mph | | |
*For tires with a maximum speed capability over 149 mph, tire manufacturers sometimes use the letters ZR. For those with a maximum speed capability over 186 mph, tire manufactures always use the letters ZR.
Source: consumerreport.org
Chart source: safercar.gov
Load Rating
This two- or three- digit numeric code indicates the tire’s load index. It is an index that relates to how much weight a tire can carry. You may find this information in your Owner’s Guide. If not, contact your local tire dealer.
Note: you may not find this information on all tires because it is not required by law.
| Load Index Ratings |
| Load Index |
Load (lb) |
Load Index |
Load (lb) |
| 74 |
827 |
113 |
2535 |
| 75 |
853 |
114 |
2601 |
| 76 |
882 |
115 |
2679 |
| 77 |
908 |
116 |
2756 |
| 78 |
937 |
117 |
2833 |
| 79 |
963 |
118 |
2910 |
| 80 |
992 |
119 |
2998 |
| 81 |
1019 |
120 |
3086 |
| 82 |
1047 |
121 |
3197 |
| 83 |
1074 |
122 |
3307 |
| 84 |
1102 |
123 |
3417 |
| 85 |
1135 |
124 |
3527 |
| 86 |
1168 |
125 |
3638 |
| 87 |
1201 |
126 |
3748 |
| 88 |
1235 |
127 |
3858 |
| 89 |
1279 |
128 |
3968 |
| 90 |
1323 |
129 |
4079 |
| 91 |
1356 |
130 |
4189 |
| 92 |
1389 |
131 |
4299 |
| 93 |
1433 |
132 |
4409 |
| 94 |
1477 |
133 |
4541 |
| 95 |
1521 |
134 |
4674 |
| 96 |
1565 |
135 |
4806 |
| 97 |
1609 |
136 |
4938 |
| 98 |
1653 |
137 |
5071 |
| 99 |
1709 |
138 |
5203 |
| 100 |
1764 |
139 |
5357 |
| 101 |
1819 |
140 |
5512 |
| 102 |
1874 |
141 |
5677 |
| 103 |
1929 |
142 |
5842 |
| 104 |
1984 |
143 |
6008 |
| 105 |
2039 |
144 |
6173 |
| 106 |
2094 |
145 |
6393 |
| 107 |
2149 |
146 |
6614 |
| 108 |
2205 |
147 |
6779 |
| 109 |
2271 |
148 |
6944 |
| 110 |
2337 |
149 |
7165 |
| 111 |
2403 |
150 |
7385 |
| 112 |
2469 |
|
|
Source: Michelin North America
Sidewall Definitions
Sidewall is another way of saying, "visible side of the tire".
Tire Manufacturer sidewall definitions:
| Sidewall Abbreviation |
Definition |
| BSB |
Broken Serrated Band |
| BSL |
Black Serrated Letters |
| BSW |
Black Sidewall |
| DSB |
Diagonal Serrated Band |
| OBL |
Outlined Black Letters |
| ORBL |
Outlined Raised Black Letter |
| ORWL |
Outlined White Letter |
| OWL |
Outline White Letter |
| RBL |
Recessed Black Letter |
| ROWL |
Raised Outline White Letter |
| RRBL |
Raised Black Letter |
| RWL |
Raised White Letter |
| SBL |
Smooth Black Letter |
| TL |
Tubeless |
| VDS |
Variable Depth Serration |
| VSB |
Vertical Serrated Letter |
| WSW |
White Sidewall |
| WW |
Whitewall |
| XNW |
Extra Narrow White |
UTQG
Uniform Tire Quality Grades (UTQG) apply to new pneumatic passenger car tires. The Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width.
- Treadwear: The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 would wear one and one-half times as well on the government course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm due to variations in driving habits, service practices, and differences in road characteristics and climate.
- Traction: The traction grades, from highest to lowest are AA, A, B, and C. The grades represent the tire’s ability to stop on wet pavement as measured under controlled conditions on specified government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance.
WARNING: The traction grade assigned to this tire is based on straight-ahead braking traction tests, and does not include acceleration, cornering, hydroplaning or peak traction characteristics.
- Temperature: The temperature grades are A (the highest), B and C, representing the tire’s resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperature can cause the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire failure. The grade C corresponds to a level of performance which all passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 139. Grades B and A represent higher levels of performance on the laboratory test wheel than the minimum required by law.
WARNING: The temperature grade for this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, underinflation, or excessive loading, either separately or in combination, can cause heat buildup and possible tire failure.
Source: Ford Owner's Guide
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The features and benefits of this tire were provided by the Tire Manufacturer.
Width
This three-digit number gives the width in millimeters of the tire from sidewall edge to sidewall edge. In general, the larger the number, the wider the tire.
Source: safercar.gov
Aspect Ratio
This two-digit number, known as the aspect ratio, gives the tire's ratio of height to width. Numbers of 70 or lower indicate a short sidewall for improved steering response and better overall handling on dry pavement.
Source: safercar.gov
Rim Size
This is the Rim Diameter code. This two-digit number is the wheel or rim diameter in inches. If you change your wheel size, you will have to purchase new tires to match the new wheel diameter.
Source: safercar.gov
Select your vehicle to find the right tire
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Vehicle trim level (examples: the "SE" in "Ford Focus SE," or the "i Sport" in "Mazda 6 i Sport") is required to narrow down our wide selection of name-brand tires for your specific vehicle.
By not choosing an option in the "Trim" drop-down box, you will see tire listings for all trim levels available at Quick Lane Tire & Auto Centers for your vehicle model, not just the tire listings that fit your vehicle's particular trim level.
Vehicle trim level is often indicated by chrome badging on the rear or trunk area of the vehicle. It is also typically printed on the vehicle's window sticker (also known as the "Monroney" sticker), among other vehicle paperwork.
Trim level can affect many aspects of the vehicle that are related to performance, such as stability and handling, advanced electronics, and weight. Therefore, it is important to choose a tire that works best with your vehicle’s trim level.
The best way to determine your vehicle's trim level and optimal tire choices is to visit your local Quick Lane Tire & Auto Center for expert help.
Where do I find my tire size?
Your tire size can be found in the number located on the sidewall of your tire.
How do I read my tire size?
The following diagram illustrates some of the important aspects of your tire size:
Metric Type (P)
The “P” indicates the tire is for passenger vehicles. “LT” would indicate a light truck tire.
Width (215)
This three-digit number gives the width in millimeters of the tire from sidewall edge to sidewall edge. In general, the larger the number, the wider the tire.
Aspect Ratio (65)
The two-digit number, know as the aspect ratio, gives the tire’s ratio of height to width. Numbers of 70 or lower indicate a short sidewall for improved steering response and better overall handling on dry pavement.
Construction Type (R)
The “R” stands for the radial. Radial ply construction of tires has been the industry standard for the past 20 years.
Rim Size (15)
This two-digit number is the wheel or rim size’s diameter in inches. If you change your wheel size, you will have to purchase new tires to match the new wheel size.
Source: safercar.gov
Results for 1991 Mercury Grand Marquis Tires
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Where do I find my tire size?
Your tire size can be found in the number located on the sidewall of your tire.
How do I read my tire size?
The following diagram illustrates some of the important aspects of your tire
size:
Metric Type (P)
The “P” indicates the tire is for passenger vehicles. “LT” would indicate a
light truck tire.
Width (215)
This three-digit number gives the width in millimeters of the tire from sidewall
edge to sidewall edge. In general, the larger the number, the wider the tire.
Aspect Ratio (65)
The two-digit number, know as the aspect ratio, gives the tire’s ratio of height
to width. Numbers of 70 or lower indicate a short sidewall for improved steering
response and better overall handling on dry pavement.
Construction Type (R)
The “R” stands for the radial. Radial ply construction of tires has been the
industry standard for the past 20 years.
Rim Size (15)
This two-digit number is the wheel or rim size’s diameter in inches. If you
change your wheel size, you will have to purchase new tires to match the new
wheel size.
Source:
safercar.gov
Tire Type
Tire Types are tire categories describing different attributes and tire
performance levels as determined by the respective Tire Manufacturer's
definitions.
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