Tire size can be confusing. Some numbers on the sidewall are listed in millimeters while others are inches. Plus, the right size for your car, truck, or trailer can differ depending on where and how you drive.
You can see your original equipment tire size in your owner’s manual or on the placard generally located on the driver’s side door jam. This is the sizing recommended by the vehicle manufacturer.
If you’re interested in switching out your tires for a different look or performance, a good place to start is the numbers and other indicators on your existing tires’ sidewall. Next, have a tire professional help you determine a tire size range that will fit your vehicle and driving needs.
Here’s what those numbers and indicators on the sidewall indicate and how to understand them:
A: TIRE TYPE The first letter in the code tells you what class of tire it is.
P stands for passenger vehicle tire. P-class tires include cars, SUVs, crossovers, minivans and smaller pickup trucks.
LT means light truck tire, designed for vehicles that are capable of carrying heavy loads, towing trailers, or for those looking for an extra heavy duty option. These are often equipped on three-quarter or 1 ton trucks and SUVs.
ST stands for Special Trailer. These tire sizes are meant for trailers, including fifth wheels and other travel trailers, as well as boat and utility trailers.
If there’s no letter before the first number, you have a metric tire most commonly referred to as European size. It’s also measured in millimeters but may have a different load capacity than a P or LT tire.
B: TIRE WIDTH The three-digit number following the letter is the tire’s width (from side to side, looking at the tire head on) in millimeters. This may also be referred to as the section width.
C: ASPECT RATIO The forward slash separates the tire width number from the two-digit aspect ratio. The bigger the aspect ratio, the higher/taller the tire’s sidewall, or “profile” as it’s sometimes called.
The aspect ratio is indicated on the tire sidewall as a percentage. It’s the height of the sidewall measured from wheel rim to top of the tread, expressed as a percentage of tire width.
In this example, the aspect ratio is 65, meaning the sidewall is 65 percent as high as the tire is wide. To get the sidewall height, take the tire width of 215 mm and convert it to inches (8.46). Then multiply this by 65% (.65). This gives you an answer of 5.5, the sidewall height in inches.
D: CONSTRUCTION TYPE This single letter tells you about the internal construction of the tire.
R is for radial tires, the industry standard for most tires today. They have better road grip, lower rolling resistance for better gas mileage, ride comfort and durability than previous generations of tires.
In a radial tire, the plies — layers of strong cords made of a blend of polyester, steel and fabric and coated with rubber — are laid perpendicular to the direction of travel.
D is for tires built with diagonal (crisscrossed) plies, called bias-constructed tires. They are also called conventional, x-ply, or cross-ply tires. Some motorcycle and trailer tires still use this internal construction.
Some run-flat tires are identified with an F followed by the type of internal construction.
E: WHEEL DIAMETER This two-digit number specifies wheel diameter in inches. It’s the distance between the two bead seat areas (where a tire gets tightly sealed onto the wheel).
F: LOAD INDEX The two-digit or three-digit number that follows the gap specifies tire load index. The load index symbol indicates how much weight a tire can support, based on the following standard chart. In our example, the load index is 89, which indicates the tire has a load capacity of 1,279 pounds, when inflated to the tire’s maximum air pressure rating.
G: SPEED RATING The last letter is the tire speed rating. This indicates the top speed it’s safe to travel at for a sustained amount of time. A tire with a higher speed rating can handle heat better and provide more control at faster speeds. The maximum operating speed of a vehicle is no more than the lowest speed rating of all tires mounted on the vehicle. (Of course, you should always abide by speed limits for safer driving.) Speed rating is usually, but not always, a single letter (see the chart).
Below you will find several charts that will help you understand tire sizing numbers, including a load index chart and speed rating chart.
A tire size calculator is a quick way to see whether the tire size you’re considering will likely fit your car, SUV, sports car, light truck or crossover.
But remember that is only an estimate. It’s important to stay within the sizing tolerances of your vehicle.
Tires that are the wrong size could cause some pull in the steering wheel, rub against the suspension or body of your vehicle, reduce clearance on hills, or result in a stiffer or noisier ride.
If you’re considering mounting a different tire size on your vehicle, check with a tire expert. Find out whether the tires and wheels you have your eye on are the right fit for your vehicle’s suspension, gearing, and bodywork. And ask how any differences in revolutions per mile, tire speed, load index, and speed rating will affect your ride quality and vehicle performance.
See how new tires and rims will look on your car or truck using our Virtual Wheels simulator, available at any Les Schwab.
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When shopping for tires online, you’ll notice the terms load index, load range, and speed rating included within the technical specifications. (You can find these numbers and letters on your existing tires, located after the size of the tire.
) Understanding the meaning of load index and load range can help you find the right tire for your vehicle and your needs. As always, the experts at Les Schwab can answer all of your questions about what tires are right for you, but in this quick article, we’ll cover some of the basics of these indicators.
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The load index of a tire is a number that correlates to the maximum safe carrying capacity of the tire when it’s inflated to its maximum pressure. Higher load index ratings mean your tires will be able to handle a heavier load. In this example, there are two numbers. The higher number (load index) is for single rear-wheel applications. The lower number is for dual-wheel applications. This indicates its load-carrying capacity when inflated to its maximum pressure. Remember, air pressure is what carries the load in a tire. You can find each tire’s carrying capacity with the chart below.
| LOAD INDEX |
LOAD (lbs) |
LOAD INDEX |
LOAD (lbs) |
LOAD INDEX |
LOAD (lbs) |
|---|---|---|---|---|---|
| 65 | 639 | 94 | 1477 | 123 | 3417 |
| 66 | 661 | 95 | 1521 | 124 | 3527 |
| 67 | 677 | 96 | 1565 | 125 | 3638 |
| 68 | 694 | 97 | 1609 | 126 | 3748 |
| 69 | 716 | 98 | 1653 | 127 | 3858 |
| 70 | 739 | 99 | 1709 | 128 | 3968 |
| 71 | 761 | 100 | 1764 | 129 | 4079 |
| 72 | 783 | 101 | 1819 | 130 | 4189 |
| 73 | 805 | 102 | 1874 | 131 | 4299 |
| 74 | 827 | 103 | 1929 | 132 | 4409 |
| 75 | 853 | 104 | 1984 | 133 | 4541 |
| 76 | 882 | 105 | 2039 | 134 | 4674 |
| 77 | 908 | 106 | 2094 | 135 | 4806 |
| 78 | 937 | 107 | 2149 | 136 | 4938 |
| 79 | 963 | 108 | 2205 | 137 | 5071 |
| 80 | 992 | 109 | 2271 | 138 | 5203 |
| 81 | 1019 | 110 | 2337 | 139 | 5357 |
| 82 | 1047 | 111 | 2403 | 140 | 5512 |
| 83 | 1074 | 112 | 2469 | 141 | 5677 |
| 84 | 1102 | 113 | 2535 | 142 | 5842 |
| 85 | 1135 | 114 | 2601 | 143 | 6008 |
| 86 | 1168 | 115 | 2679 | 144 | 6173 |
| 87 | 1201 | 116 | 2756 | 145 | 6393 |
| 88 | 1235 | 117 | 2833 | 146 | 6614 |
| 89 | 1279 | 118 | 2910 | 147 | 6779 |
| 90 | 1323 | 119 | 2998 | 148 | 6944 |
| 91 | 1356 | 120 | 3086 | 149 | 7165 |
| 92 | 1389 | 121 | 3197 | 150 | 7385 |
| 93 | 1433 | 122 | 3307 |
| LOAD INDEX | LOAD (lbs) |
|---|---|
| 65 | 639 |
| 66 | 661 |
| 67 | 677 |
| 68 | 694 |
| 69 | 716 |
| 70 | 739 |
| 71 | 761 |
| 72 | 783 |
| 73 | 805 |
| 74 | 827 |
| 75 | 853 |
| 76 | 882 |
| 77 | 908 |
| 78 | 937 |
| 79 | 963 |
| 80 | 992 |
| 81 | 1019 |
| 82 | 1047 |
| 83 | 1074 |
| 84 | 1102 |
| 85 | 1135 |
| 86 | 1168 |
| 87 | 1201 |
| 88 | 1235 |
| 89 | 1279 |
| 90 | 1323 |
| 91 | 1356 |
| 92 | 1389 |
| 93 | 1433 |
| 94 | 1477 |
| 95 | 1521 |
| 96 | 1565 |
| 97 | 1609 |
| 98 | 1653 |
| 99 | 1709 |
| 100 | 1764 |
| 101 | 1819 |
| 102 | 1874 |
| 103 | 1929 |
| 104 | 1984 |
| 105 | 2039 |
| 106 | 2094 |
| 107 | 2149 |
| 108 | 2205 |
| 109 | 2271 |
| 110 | 2337 |
| 111 | 2403 |
| 112 | 2469 |
| 113 | 2535 |
| 114 | 2601 |
| 115 | 2679 |
| 116 | 2756 |
| 117 | 2833 |
| 118 | 2910 |
| 119 | 2998 |
| 120 | 3086 |
| 121 | 3197 |
| 122 | 3307 |
| 123 | 3417 |
| 124 | 3527 |
| 125 | 3638 |
| 126 | 3748 |
| 127 | 3858 |
| 128 | 3968 |
| 129 | 4079 |
| 130 | 4189 |
| 131 | 4299 |
| 132 | 4409 |
| 133 | 4541 |
| 134 | 4674 |
| 135 | 4806 |
| 136 | 4938 |
| 137 | 5071 |
| 138 | 5203 |
| 139 | 5357 |
| 140 | 5512 |
| 141 | 5677 |
| 142 | 5842 |
| 143 | 6008 |
| 144 | 6173 |
| 145 | 6393 |
| 146 | 6614 |
| 147 | 6779 |
| 148 | 6944 |
| 149 | 7165 |
| 150 | 7385 |
On some tires, you’ll see a load range indicator on the sidewall, as shown here.
Load Range is an older measure of tire carrying capacity equivalent to
ply rating. The ply rating isn’t directly tied to the number of plies used in construction, so we recommend using Load Index when
appropriate. Load ranges are arranged in alphabetical order starting with the letter “A”. The ply ratings (load range) combined with the tire size tell you the tire load capacity.
The load range on replacement tires must meet or exceed the recommendation on your vehicle’s door placard or owner’s manual. It can be higher than recommended but never lower.
| LOAD RANGE | PLY RATING |
|---|---|
| A | 2 |
| B | 4 |
| C | 6 |
| D | 8 |
| E | 10 |
| F | 12 |
Les Schwab Tip: Some cars, including electric vehicles, may require tires with a higher load range due to weight with and without passengers.
If this seems confusing. Don’t worry. The pros at Les Schwab will show you all of your options, including the size, load range, and load index you need for work, weekends, or your daily commute.
When we buy a wheel assembly, there are no questions about what disk parameters to pay attention to. But when changing tires or choosing new wheels, you need to choose the right size.
If you select discs only by diameter and bolt pattern, then you can buy an unsuitable kit. It either won't work, or will cause serious problems in the future. So, a violation of the size of the disk and tires can provoke:
deterioration in response to driver commands when maneuvering and turning;
reduced sidewall stiffness;
tire deformation;
decrease in wear resistance.
To find out which disc is suitable for the selected set of tires, use the table:
| Tire height | Tire size | Disk size | ||
| Recommended | Min. | Max. | ||
| Over 12" | ||||
| 82 | 125R12 135R12 145R12 155R12 | 3.5 4.0 4.0 4.5 | 3.0 3.5 3.5 4.0 | 4.0 4.5 5.0 5.0 |
| 70 | 145/70R12 155/70R12 | 4.5 4.5 | 4.0 4.0 | 5.0 5.5 |
| Over 13" | ||||
| 82 | 145R13 155R13 165R13 175R13 | 4.0 4.5 4.5 5.0 | 3.5 4.0 4.0 4.5 | 5.0 5.  5 5.5 6.0 |
| 80 | 135/80R13 145/80R13 155/80R13 165/80R13 | 3.5 4.0 4.5 4.5 | 3.5 3.5 4.0 4.0 | 4.5 5.0 5.5 5.5 |
| 70 | 135/70R13 145/70R13 155/70R13 165/70R13 175/70R13 185/70R13 195/70R13 | 4.0 4.5 4.5 5.0 5.0 5.5 6.0 | 3.5 4.0 4.0 4.5 5.0 5.0 5.2 | 4.5 5.0 5.5 6.0 6.0 6.5 7.0 |
| 65 | 155/65R13 165/65R13 175/65R13 | 4.5 5.0 5.0 | 4.0 4.5 5.0 | 5.5 6.0 6.0 |
| 60 | 175/60R13 185/60R13 205/60R13 | 5. 0 5.5 6.0 | 5.0 5.5 5.5 | 6.0 6.5 7, |
| 55 | 195/55R13 | 6.0 | 5.5 | 7.0 |
| Over 14 inches | ||||
| 82 | 145R14 155R14 165R14 175R14 185R14 | 4.0 4.5 4.5 5.0 5.5 | 3.5 4.0 4.0 4.5 4.5 | 5.0 5.0 5.5 6.0 6.0 |
| 80 | 175/80R14 185/80R14 | 5.0 5.0 | 4.5 5.0 | 5.5 6.0 |
| 70 | 165/70R14 175/70R14 185/70R14 195/70R14 205/70R14 | 5. 0 5.0 5.5 6.0 6.0 | 4.5 5.0 5.0 5.5 5.5 | 6.0 6.0 6.5 7.0 7.5 |
| 65 | 155/65R14 165/65R14 175/65R14 185/65R14 195/65R14 | 4.5 5.0 5.0 5.5 6.0 | 4.0 4.5 5.0 5.0 5.5 | 5.5 6.0 6.0 6.5 7.0 |
| 60 | 165/60R14 175/60R14 185/60R14 195/60R14 205/60R14 | 5.0 5.0 5.5 6.0 6.0 | 4.5 5.0 5.0 5.5 5.5 | 6.0 6.0 6.5 7.0 7.5 |
| 55 | 185/55R14 205/55R14 | 6.0 6.5 | 5.0 5.  5 | 6.5 7.5 |
| Over 15" | ||||
| 82 | 125R15 135R15 145R15 155R15 165R15 185R15 | 3.5 4.0 4.0 4.5 4.5 5.5 | 3.0 3.5 3.5 4.0 4.0 4.5 | 4.0 4.5 5.0 5.0 5.5 6.0 |
| 80 | 185/80R15 | 5.5 | 4.5 | 6.0 |
| 70 | 175/70R15 195/70R15 235/70R15 | 5.0 6.0 7.0 | 5.0 5.5 6.5 | 6.0 7.0 8.5 |
| 65 | 185/65R15 195/65R15 205/65R15 215/65R15 225/65R15 | 5. 5 6.0 6.0 6.5 6.5 | 5.0 5.5 5.5 6.0 6.0 | 6.5 7.0 7.5 7.5 8.0 |
| 60 | 195/60R15 205/60R15 215/60R15 225/60R15 | 6.0 6.0 6.5 6.5 | 5.5 5.5 6.0 6.0 | 7.0 7.5 8.0 8.0 |
| 55 | 185/55R15 195/55R15 205/55R15 225/55R15 | 6.0 6.0 6.5 7.0 | 5.0 5.5 5.5 6.0 | 6.5 7.0 7.5 8.0 |
| fifty | 195/50R15 205/50R15 225/50R15 | 6.0 6.5 7.0 | 5.5 5.5 6.0 | 7.0 7.5 8.0 |
| 45 | 195/45R15 | 6. 5 | 6.0 | 7.5 |
| Over 16" | ||||
| 65 | 215/65R16 | 6.5 | 5.5 | 7.5 |
| 60 | 225/60R16 235/60R16 | 6.5 7.0 | 6.0 6.5 | 8.0 8.5 |
| 55 | 205/55R16 225/55R16 245/55R16 | 6.5 7.0 7.5 | 5.5 6.0 7.0 | 7.5 8.0 8.5 |
| fifty | 205/50R16 225/50R16 235/50R16 255/50R16 | 6.5 7.0 7.5 8.0 | 5.5 6.0 6.5 7.0 | 7.5 8.  0 8.5 9.0 |
| 45 | 195/45R16 205/45R16 225/45R16 245/45R16 | 6.5 7.0 7.5 8.0 | 6.0 6.5 7.0 7.5 | 7.5 7.5 8.5 9.0 |
| 40 | 215/40R16 225/40R16 | 7.5 8.0 | 7.0 7.5 | 8.5 9.0 |
| Over 17" | ||||
| 55 | 225/55R17 | 7.0 | 6.0 | 8.0 |
| fifty | 205/50R17 215/50R17 | 6.5 7.0 | 5.5 6.0 | 7.5 7.5 |
| 45 | 215/45R17 225/45R17 235/45R17 245/45R17 255/45R17 | 7. 0 7.5 8.0 8.0 8.5 | 7.0 7.0 7.5 7.5 8.0 | 8.5 8.5 9.0 9.0 9.5 |
| 40 | 215/40R17 235/40R17 245/40R17 255/40R17 265/40R17 275/40R17 285/40R17 | 7.5 8.5 8.5 9.0 9.5 9.5 10.0 | 7.0 8.0 8.0 8.5 9.0 9.0 8.5 | 8.5 9.5 9.5 10.0 10.5 11.0 11.0 |
| 35 | 245/35R17 265/35R17 335/35R17 | 8.5 9.5 11.5 | 8.0 9.0 11.0 | 9.5 10.5 13.0 |
| Over 18" | ||||
| fifty | 235/50R18 | 7. 5 | 6.5 | 8.5 |
| 45 | 255/45R18 | 8.5 | 8.0 | 9.5 |
| 40 | 225/40R18 235/40R18 245/40R18 265/40R18 | 8.0 8.0 8.5 9.5 | 7.5 7.5 8.0 9.0 | 9.0 9.0 9.5 10.5 |
| 35 | 285/35R18 295/35R18 | 10.0 10.5 | 9.5 10.0 | 11.0 11.5 |
| thirty | 325/30R18 | 12.0 | 11.0 | 13.0 |
| Over 20" | ||||
| 40 | 245/40R20 | 9. 0 | 8.0 | 9.5 |
| 35 | 275/35R20 | 10.0 | 9.0 | 11.0 |
A small recommendation. Try to buy tires and wheels in one place. This will reduce the risk of buying products with inappropriate sizes.
Tire and rim size charts
| Diameter | Size | Rim width | ||
|---|---|---|---|---|
| Min. | Recommended mend. | Max. | ||
| 12 | 125 R12 | 3. 5 | 3.0 | 4.0 |
| 135 R12 | 4.0 | 3.5 | 4.5 | |
| 145 R12 | 4.0 | 3.5 | 5.0 | |
| 155 R12 | 4.5 | 4.0 | 5.0 | |
| 145/70 R12 | 4.5 | 4.0 | 5.0 | |
| 155/70 R12 | 4.5 | 4.0 | 5.5 | |
| 13 | 145/80 R13 | 3.5 | 4 | 5 |
| 145/70 R13 | 3.5 | 4.5 | 5 | |
| 145/60 R13 | 4 | 4.5 | 5 | |
| 155/80 R13 | 4 | 4.5 | 5 | |
| 155/70 R13 | 4 | 4.5 | 5 | |
| 165/80 R13 | 4 | 4.5 | 5 | |
| 165/70 R13 | 4 | 5 | 5. 5 | |
| 165/65 R13 | 4.5 | 5 | 6 | |
| 175/70 R13 | 4.5 | 5 | 6 | |
| 175/65 R13 | 5 | 5 | 6 | |
| 185/70 R13 | 4.5 | 5.5 | 6 | |
| 14 | 145/65 R14 | 4 | 4.5 | 5 |
| 155/65 R14 | 4.5 | 4.5 | 5.5 | |
| 165/70 R14 | 4 | 5 | 5.5 | |
| 165/65 R14 | 4.5 | 5 | 6 | |
| 165/60 R14 | 4.5 | 5 | 6 | |
| 175/80 R14 | 4.5 | 5 | 6 | |
| 175/70 R14 | 4.5 | 5 | 6 | |
| 175/65 R14 | 5 | 5 | 6 | |
| 175/60 R14 | 5 | 5 | 6 | |
| 185/70 R14 | 4. 5 | 5.5 | 6 | |
| 185/65 R14 | 5 | 5.5 | 6.5 | |
| 185/60 R14 | 5 | 5.5 | 6.5 | |
| 185/55 R14 | 5 | 6 | 6.5 | |
| 195/70 R14 | 5 | 6 | 6.5 | |
| 195/65 R14 | 5.5 | 6 | 7 | |
| 195/60 R14 | 5.5 | 6 | 7 | |
| 15 | 145/65 R15 | 4 | 4.5 | 5 |
| 155/70 R15 | 4 | 4.5 | 5 | |
| 155/65 R15 | 4.5 | 4.5 | 5.5 | |
| 165/65 R15 | 4.5 | 5 | 6 | |
| 175/65 R15 | 5 | 5 | 6 | |
| 175/60 R15 | 5 | 5 | 6 | |
| 175/55 R15 | 5 | 5. 5 | 6 | |
| 185/65 R15 | 5 | 5.5 | 6.5 | |
| 185/60 R15 | 5 | 5.5 | 6.5 | |
| 185/55 R15 | 5 | 6 | 6.5 | |
| 195/70 R15 | 5 | 6 | 6.5 | |
| 195/65 R15 | 5.5 | 6 | 7 | |
| 195/60 R15 | 5.5 | 6 | 7 | |
| 195/55 R15 | 5.5 | 6 | 7 | |
| 195/50 R15 | 5.5 | 6 | 7 | |
| 195/45 R15 | 6 | 6.5 | 7.5 | |
| 205/70 R15 | 5 | 6 | 7 | |
| 205/65 R15 | 5.5 | 6 | 7.5 | |
| 205/60 R15 | 5.5 | 6 | 7.5 | |
| 205/55 R15 | 5. 5 | 6.5 | 7.5 | |
| 205/50 R15 | 5.5 | 6.5 | 7.5 | |
| 215/70 R15 | 5.5 | 6.5 | 7 | |
| 215/65 R15 | 6 | 6.5 | 7.5 | |
| 225/60 R15 | 6 | 6.5 | 8 | |
| 225/55 R15 | 6 | 7 | 8 | |
| 225/50 R15 | 6 | 7 | 8 | |
| 16 | 195/60 R16 | 5.5 | 6 | 7 |
| 195/55 R16 | 5.5 | 6 | 7 | |
| 195/50 R16 | 5.5 | 6 | 7 | |
| 195/45 R16 | 6 | 6.5 | 7.5 | |
| 205/60 R16 | 5.5 | 6 | 7.5 | |
| 205/55 R16 | 5.5 | 6.5 | 7. 5 | |
| 205/50 R16 | 5.5 | 6.5 | 7.5 | |
| 205/45 R16 | 6.5 | 7 | 7.5 | |
| 215/65 R16 | 6 | 6.5 | 7.5 | |
| 215/60 R16 | 6 | 6.5 | 7.5 | |
| 215/55 R16 | 6 | 7 | 7.5 | |
| 215/40 R16 | 7 | 7.5 | 8.5 | |
| 225/60 R16 | 6 | 6.5 | 8 | |
| 225/55 R16 | 6 | 7 | 8 | |
| 225/50 R16 | 6 | 7 | 8 | |
| 235/60 R16 | 6.5 | 7 | 8.5 | |
| 245/55 R16 | 7.5 | 8 | 9 | |
| 17 | 205/55 R17 | 5.5 | 6.5 | 7.5 |
| 205/50 R17 | 5. 5 | 6.5 | 7.5 | |
| 205/45 R17 | 6.5 | 7 | 7.5 | |
| 205/40 R17 | 7 | 7.5 | 8 | |
| 215/60 R17 | 6 | 6.5 | 7.5 | |
| 215/55 R17 | 6 | 7 | 7.5 | |
| 215/50 R17 | 6 | 7 | 7.5 | |
| 215/45 R17 | 7 | 7 | 8 | |
| 215/40 R17 | 7 | 7.5 | 8.5 | |
| 225/60 R17 | 6 | 6.5 | 8 | |
| 225/55 R17 | 6 | 7 | 8 | |
| 225/50 R17 | 6 | 7 | 8 | |
| 225/45 R17 | 7 | 7.5 | 8.5 | |
| 225/35 R17 | 7.5 | 8 | 9 | |
| 235/65 R17 | 6. 5 | 7 | 8.5 | |
| 235/55 R17 | 6.5 | 7.5 | 8.5 | |
| 235/50 R17 | 6.5 | 7.5 | 8.5 | |
| 235/45 R17 | 7.5 | 8 | 9 | |
| 235/40 R17 | 8 | 8.5 | 9.5 | |
| 245/55 R17 | 7 | 7.5 | 8.5 | |
| 245/45 R17 | 7.5 | 8 | 9 | |
| 245/40 R17 | 8 | 8.5 | 9.5 | |
| 255/55 R17 | 7 | 8 | 9 | |
| 255/45 R17 | 8 | 8.5 | 9.5 | |
| 255/40 R17 | 8.5 | 9 | 10 | |
| 265/40 R17 | 9 | 9.5 | 10.5 | |
| 275/40 R17 | 9 | 9.5 | 11 | |
| 285/40 R17 | 9. 5 | 10 | 11 | |
| 335/35 R17 | 11 | 12 | 13 | |
| 18 | 205/40 R18 | 7 | 7.5 | 8 |
| 215/45 R18 | 7 | 7 | 8 | |
| 225/60 R18 | 6 | 6.5 | 8 | |
| 225/45 R18 | 7 | 7.5 | 8.5 | |
| 225/40 R18 | 7.5 | 8 | 9 | |
| 225/35 R18 | 7.5 | 8 | 9 | |
| 235/65 R18 | 6.5 | 7 | 8.5 | |
| 235/50 R18 | 6.5 | 7.5 | 8.5 | |
| 235/45 R18 | 7.5 | 8 | 9 | |
| 235/40 R18 | 8 | 8.5 | 9.5 | |
| 245/50 R18 | 7 | 7.5 | 8. 5 | |
| 245/45 R18 | 7.5 | 8 | 9 | |
| 245/40 R18 | 8 | 8.5 | 9.5 | |
| 245/35 R18 | 8 | 8.5 | 9.5 | |
| 255/45 R18 | 8 | 8.5 | 9.5 | |
| 255/40 R18 | 8.5 | 9 | 10 | |
| 255/35 R18 | 8.5 | 9 | 10 | |
| 265/40 R18 | 9 | 9.5 | 10.5 | |
| 265/35 R18 | 9 | 9.5 | 10.5 | |
| 275/45 R18 | 8.5 | 9 | 10.5 | |
| 275/40 R18 | 9 | 9.5 | 11 | |
| 275/35 R18 | 9 | 9.5 | 11 | |
| 285/40 R18 | 9.5 | 10 | 11 | |
| 285/35 R18 | 9. 5 | 10 | 11 | |
| 285/30 R18 | 10 | 10 | 10.5 | |
| 295/35 R18 | 10 | 10.5 | 11.5 | |
| 295/30 R18 | 10.5 | 10.5 | 11 | |
| 315/30 R18 | 11 | 11 | 12.5 | |
| 335/30 R18 | 12 | 12 | 12.5 | |
| 345/35 R18 | 11.5 | 12 | 13.5 | |
| 345/30 R18 | 12 | 12 | 12.5 | |
| 19 | 225/40 R19 | 7.5 | 8 | 9 |
| 225/35 R19 | 7.5 | 8 | 9 | |
| 235/35 R19 | 8 | 8.5 | 9.5 | |
| 245/45 R19 | 7.5 | 8 | 9 | |
| 245/40 R19 | 8 | 8. 5 | 9.5 | |
| 245/35 R19 | 8 | 8.5 | 9.5 | |
| 255/40 R19 | 8.5 | 9 | 10 | |
| 255/35 R19 | 8.5 | 9 | 10 | |
| 255/30 R19 | 8.5 | 9 | 9.5 | |
| 265/35 R19 | 9 | 9.5 | 10.5 | |
| 265/30 R19 | 9 | 9.5 | 10 | |
| 275/50 R19 | 7.5 | 8.5 | 9.5 | |
| 275/40 R19 | 9 | 9.5 | 11 | |
| 275/35 R19 | 9 | 9.5 | 11 | |
| 275/30 R19 | 9 | 9.5 | 10 | |
| 285/35 R19 | 9.5 | 10 | 11 | |
| 295/30 R19 | 10.5 | 10.5 | 11 | |
| 305/30 R19 | 11 | 11 | 12 | |
| 315/25 R19 | 11 | 11. 5 | 12 | |
| 325/30 R19 | 11 | 11.5 | 12 | |
| 345/30 R19 | 12 | 12 | 12.5 | |
| 20 | 235/30 R20 | 8.5 | ||
| 245/40 R20 | 8 | 8.5 | 9.5 | |
| 245/35 R20 | 8 | 8.5 | 9.5 | |
| 245/30 R20 | 8 | 8.5 | 9 | |
| 255/35 R20 | 8.5 | 9 | 10 | |
| 255/30 R20 | 8.5 | 9 | 9.5 | |
| 275/45 R20 | 8.5 | 9 | 10.5 | |
| 275/35 R20 | 9 | 9.5 | 11 | |
| 285/30 R20 | 10 | 10 | 10.5 | |
| 285/25 R20 | 10.5 | |||
| 295/25 R20 | 10. 5 | 10.5 | 11 | |
| 305/35 R20 | 10 | 11 | 12 | |
| 305/25 R20 | 10.5 | 11 | 11.5 | |
| 325/25 R20 | 11.5 | 12 | 12.5 | |
| 335/30 R20 | 12 | 12 | 12.5 | |
| 21 | 245/35 R21 | 8 | 8.5 | 9.5 |
| 255/30 R21 | 9 | 9 | 9.5 | |
| 285/30 R21 | 10 | 10 | 10.5 | |
| 295/25 R21 | 10 | 10.5 | 11 | |
| 22 | 255/30 R22 | 8.5 | 9 | 9.5 |
| 295/25 R22 | 10.5 | 10.5 | 11 | |
| Diameter | Size | Rim width | ||
|---|---|---|---|---|
Min. | Recommended mend. | Max. | ||
| 15 | 185/65 R15 | 5 | 5.5 | 6.5 |
| 195/80 R15 | 5 | 5.5 | 6.5 | |
| 195/70 R15 | 5 | 6 | 6.5 | |
| 205/70 R15 | 5 | 6 | 7 | |
| 215/80 R15 | 5.5 | 6 | 7 | |
| 225/75 R15 | 6 | 6 | 7.5 | |
| 235/75 R15 | 6 | 6.5 | 8 | |
| 255/75 R15 | 6.5 | 7 | 8.5 | |
| 265/70 R15 | 7 | 8 | 9 | |
| 16 | 205/80 R16 | 5 | 5.5 | 7 |
| 215/70 R16 | 5. 5 | 6.5 | 7 | |
| 215/65 R16 | 6 | 6.5 | 7.5 | |
| 215/60 R16 | 6 | 6.5 | 7.5 | |
| 225/75 R16 | 6 | 6 | 7.5 | |
| 225/70 R16 | 6 | 6.5 | 7.5 | |
| 235/85 R16 | 6 | 6.5 | 7.5 | |
| 235/70 R16 | 6 | 7 | 8 | |
| 235/60 R16 | 6.5 | 7 | 8.5 | |
| 245/70 R16 | 6.5 | 7 | 8 | |
| 255/70 R16 | 6.5 | 7.5 | 8.5 | |
| 255/65 R16 | 7 | 7.5 | 9 | |
| 265/70 R16 | 7 | 8 | 9 | |
| 275/70 R16 | 7 | 8 | 9 | |
| 17 | 225/65 R17 | 6 | 6. 5 | 8 |
| 225/55 R17 | 6 | 7 | 8 | |
| 235/65 R17 | 6.5 | 7 | 8.5 | |
| 235/55 R17 | 6.5 | 7.5 | 8.5 | |
| 245/65 R17 | 7 | 7 | 8.5 | |
| 255/60 R17 | 7 | 7.5 | 9 | |
| 255/50 R17 | 7 | 8 | 9 | |
| 265/65 R17 | 7.5 | 8 | 9.5 | |
| 265/70 R17 | 7 | 8 | 9 | |
| 275/65 R17 | 7.5 | 8 | 9.5 | |
| 275/55 R17 | 7.5 | 8.5 | 9.5 | |
| 18 | 225/55 R18 | 6 | 7 | 8 |
| 235/60 R18 | 6.5 | 7 | 8.5 | |
| 235/50 R18 | 6. 5 | 7.5 | 8.5 | |
| 255/60 R18 | 7 | 7.5 | 9 | |
| 255/55 R18 | 7 | 8 | 9 | |
| 255/45 R18 | 8 | 8.5 | 9.5 | |
| 265/60 R18 | 7.5 | 8 | 9.5 | |
| 285/50 R18 | 8 | 9 | 10 | |
| 19 | 255/55 R19 | 7 | 8 | 9 |
| 255/50 R19 | 7 | 8 | 9 | |
| 275/45 R19 | 8.5 | 9 | 10.5 | |
| 285/45 R19 | 9 | 9.5 | 10.5 | |
| 20 | 255/50 R20 | 7 | 8 | 9 |
| 275/50 R20 | 7.5 | 8.5 | 9.5 | |
| 275/40 R20 | 9 | 9. 5 | 11 | |
| 295/40 R20 | 10 | 10.5 | 11.5 | |
| 315/35 R20 | 10.5 | 11 | 12.5 | |
| 21 | 295/35 R21 | 10 | 10.5 | 11.5 |
| 22 | 285/35 R22 | 9.5 | 10 | 11 |
| 295/30 R22 | 10 | 10.5 | 11 | |
| 23 | 315/25 R23 | 11 | 11.5 | 12 |
| Diameter | Size | Rim width | ||
|---|---|---|---|---|
| Min. | Recommended mend. | Max. | ||
| 13 | 155/80 R13 | 4 | 4. 5 | 5 |
| 165/70 R13 | 4.5 | 5 | 5 | |
| 14 | 165/70 R14 | 4.5 | 5 | 5 |
| 165/75 R14 | 4 | 4.5 | 5 | |
| 175/65 R14 | 5 | 5 | 5.5 | |
| 175/75 R14 | 4.5 | 5 | 5.5 | |
| 185/75 R14 | 4.5 | 5 | 6 | |
| 185/80 R14 | 4.5 | 5 | 6 | |
| 195/75 R14 | 5 | 5.5 | 6 | |
| 195/80 R14 | 5 | 5.5 | 6 | |
| 205/75 R14 | 5 | 5.5 | 6.5 | |
| 15 | 185/80 R15 | 4.5 | 5 | 6 |
| 195/70 R15 | 5.5 | 6 | 6 | |
| 205/65 R15 | 5. 5 | 6 | 6.5 | |
| 205/70 R15 | 5.5 | 6 | 6.5 | |
| 215/65 R15 | 6 | 6.5 | 7 | |
| 215/70 R15 | 6 | 6.5 | 7 | |
| 225/70 R15 | 6 | 6.5 | 7 | |
| 16 | 6.5/100 R16 | 4.5 | 4.5 | 6 |
| 175/75 R16 | 4.5 | 5 | 5.5 | |
| 175/80 R16 | 4.5 | 5 | 5.5 | |
| 185/75 R16 | 4.5 | 5 | 6 | |
| 195/60 R16 | 5.5 | 6 | 6.5 | |
| 195/65 R16 | 5.5 | 6 | 6 | |
| 195/75 R16 | 5 | 5.5 | 6 | |
| 205/65 R16 | 5.5 | 6 | 6.  | |
