7.50-20 - diagonal tire
where 7.50 and 315 are the designation of the nominal width of the tire profile (in inches and millimeters, respectively);
16 and 22.5 - designation of the nominal fitting diameter of the rim (in inches);
R - designation of the radial tire;
80 - series (nominal ratio of height to width of the profile in percent).
195 - profile width in mm
R - designation of the radial design
16 - bore diameter in inches
Everything is the same, only the wheel series is 82% and is not indicated on the sidewall of the tire.
Bias Low Profile Tire
Camera designation example:
Rim tape designation example:
Correspondence of tire designations in inches and millimeters
The designation of diagonal tires is similar to the designation of radial tires.
There is a designation of tires through the overall size.
For example: 530/70-21 (1300x530-533) - Kama-410
In accordance with GOST 5513-97, the following mandatory inscriptions are applied to the tire:
a) trademark and (or) name of the manufacturer;
b) country of origin in English "Made in ...";
c) tire designation;
d) trade mark (tire model);
e) load bearing capacity indices for single and dual wheels;
g) designation "Tubeless" for tubeless tires;
i) designation "M+S" or "M.S" for winter tires;
j) date of manufacture of four digits (the first two indicate the serial number of the week, the last two indicate the year of manufacture);
k) PSI pressure index;
l) the designation "Regroovable" is applied to each of the sidewalls only if it is possible to deepen the tread pattern by cutting tires;
m) approval mark "E" indicating the approval numbers and the country that issued the certificate of conformity with UNECE Regulation No. 30 or 54
n) the designation of this standard (without the year of approval);
p) national mark of conformity when certifying a tire for compliance with the requirements of this standard;
c) serial number of the tire;
r) direction of rotation sign (in the case of a directional tread pattern);
s) All steel - for solid steel cord tires;
t) designation "TWI", indicating the location of wear indicators in the shoulder area of the tread;
x) technical control stamp.
American designations: standard size (decoding).
There are two different markings for American tires.
The first one is very similar to the European one, only the letters “P” (Passanger - for a passenger car) or “LT” (Light Truck - light truck) are placed before the size. For example: P 195/60 R 14 or LT 235/75 R15.
And another tire marking, which is fundamentally different from the European one.
For example: 31x10.5 R15 (corresponds to European standard size 265/75 R15)
- 31 is the outside diameter of the tire in inches.
- 10.5 is tire width in inches.
- R - a tire of a radial design (older models of tires were with a diagonal design).
- 15 is the inner diameter of the tire in inches.
Generally speaking, except for inches that are unusual for us, the American tire marking is logical and more understandable, unlike the European one, where the height of the tire profile is not constant and depends on the width of the tire. And here everything is simple with decoding: the first digit of the standard size is the outer diameter, the second is the width, the third is the inner diameter.
Colored labels used for tire marking:
Yellow marking on the tire
(round or triangular mark) on the sidewall indicates the lightest spot on the tire. When installing a new tire on a rim, the yellow mark must be aligned with the heaviest spot on the rim. This is usually where the nipple is attached. This allows you to improve the balance of the wheel and put weights of less weight.
On tires with mileage, this yellow marking is not so relevant, since, as a rule, when the tire wears out, its balance shifts.
Red marking (red dot on the tire)
- means the place of maximum power heterogeneity, the manifestation of which is usually associated with various connections of different layers of the tire during its manufacture. These irregularities are completely normal and all tires have them. But usually only those tires that go to the primary equipment of cars are marked with red dots, i.e. when the car leaves the factory.
This red mark is combined with white marks on the discs (white marking marks on the discs are also placed mainly for the original configuration of the car), which indicate the closest place to the center of the wheel. This is done so that the maximum inhomogeneity in the tire is minimally affected when driving, providing a more balanced power characteristic of the wheel. During normal tire fitting, it is not recommended to pay attention to the tire marking with a red mark, but to be guided by the yellow mark, combining it with the nipple.
White dot or white circle
In the case of some OE car tires, this color coding tells us the point of minimum radial force deflection (RFV), which is the most flexible part of the car tire's sidewall wall. In this case, the white dot or circle must be aligned 180° from the "L" mark, or the "top" mark on the wheel.
Marking - white stamp with number
means the number of the inspector who carried out the final inspection of the tire at the manufacturing plant.
colored stripes
on the tire tread are made to make it more convenient to "identify" the tire in the warehouse. All tire models and different sizes have different markings. Therefore, when tires are stacked in warehouses, it is immediately clear that a given stack of tires has the same size and model. These colored stripes on the tire have no other semantic load.
Additional information indicated in the marking on the sidewall of the tire:
XL or Extra Load- a reinforced tire, the load index of which is 3 units higher than that of conventional tires of the same size.
M+S or M&S tire marking (Mud + Snow)- mud plus snow and means that the tires are all-weather or winter.
Many summer tires for SUVs are labeled M&S. However, these tires must not be used in winter, as winter tires have a completely different rubber compound and tread pattern, and the M&S badge indicates good flotation performance.
All Season or AS- All season tyres.
Aw (Any Weather)- Any weather.
Pictogram * (snowflake)— rubber is designed for use in harsh winter conditions. If this marking is not on the sidewall of the tire, then this tire is intended for use only in summer conditions.
Aquatred, Aquacontact, Rain, Water, Aqua or pictogram (umbrella)- special rain tires.
outside and inside- asymmetrical tyres. When installing, the Outside inscription must be on the outside of the car, and Inside on the inside.
RSC (RunFlat System Component)- RunFlat tires are tires on which you can continue to drive a car at a speed of no more than 80 km / h with a FULL drop in pressure in the tire (in case of a puncture or cut). On these tires, depending on the manufacturer's recommendations, you can drive from 50 to 150 km.
Different tire manufacturers use different designations for RSC technology. For example: Bridgestone RFT, Continental SSR, Goodyear RunOnFlat, Nokian Run Flat, Michelin ZP, etc.
Rotation or arrow this marking on the tire sidewall indicates a directional tire. When installing the tire, you must strictly observe the direction of rotation of the wheel, indicated by the arrow.
Tubeless- tubeless tyre. In the absence of this inscription, the tire can only be used with a camera.
Tube Type- means that this tire must be used only with a camera.
Max Pressure- the maximum allowable pressure in the tire, in kPa.
Max load- the maximum allowable load on each wheel of the car, in kg.
Reinforced or letters RF in a standard size (for example 195/70 R15RF) means that it is a reinforced tire (6 layers). The letter C at the end of the size (for example 195/70 R15C) indicates a truck tire (8 layers).
Radial this marking on the rubber in the standard size means that it is a radial construction tire.
Steel means that a metal cord is present in the tire structure.
Letter E (circled)— the tire complies with the European requirements of ECE (Economic Commission for Europe).
DOT(Department of Transportation - US Department of Transportation) - American quality standard.
Temperature A, B or C- heat resistance of tires at high speeds on a test bench (A - the best indicator).
Traction A, B or C- the ability of the tire to brake on a wet roadway.
Treadwear- Relative expected mileage compared to a special US standard test.
TWI (Tread Wear Indication)- Tire tread wear indicators. The marking on the TWI wheel can also be with an arrow. Pointers are located evenly in eight or six places around the entire circumference of the tire and show the minimum allowable tread depth. The wear indicator is made in the form of a protrusion with a height of 1.6 mm (the minimum tread value for light vehicles) and is located in the tread recess (usually in the drainage grooves).
What do the designations on the tire sidewall H/P, H/T, A/T, M/T mean?
For all-wheel drive cars and 4x4 SUVs, the following categories of tires can be distinguished.
- H/P (High Performance)- Pure road tires. For driving on paved roads. The tires are as close as possible to the tires of a passenger car - for a dynamic ride. Quiet, good traction on a flat highway. The protector is not high, "racing".
- H/T (Highway Terrain)- For driving mainly on paved roads. Road tires. The tread is not high, typical for passenger tires. The sidewall of the tire is poorly protected.
- A/T (All Terrain)- Universal tires for driving, both on asphalt and on light off-road. The tread is more aggressive than the H/T (higher and hookier), the sidewall is more protected. Designed for asphalt, dirt roads, sand, stone, snow, everyday. All means that the tire performs well both on and off pavement.
- M/T (Mud Terrain)- Mud in English means dirt - tires for off-road driving. The tread is "like that of tractors", they have side lugs, they are more difficult to clog with dirt. The tires are more oaky than the A/T and are not very good on pavement (do not drive on the highway), and also behave badly on ice. Designed for: driving on broken roads, ruts, clay, wetlands.
Sidewall wear indicator
It is applied to the sidewalls as usual for bus tires. This sign is nothing more than a sidewall wear index, since the bus must park tightly to the curb near the stop, respectively, in the process of sidewall abrasion, numbers remain, which show the degree of wear.
How to find out the date of manufacture of a tire
The date of manufacture of a passenger tire tire is written as four digits in an oval (for example, 3706) - the first two digits are the week of manufacture, the next two are the year of manufacture (in our example, week 37, 2006).
Russian truck tires are marked as follows
Where 3494 is the date of manufacture of the K-letter, 00092 is the serial number of the tire
The 3-digit date code on the tire means that it was produced before 2000.
The old marking is similar to the new one, i.e. the first two digits are also the week of manufacture, but the last digit does not mean the full year, but only the last digit of the year.
For example, code: 108. This means that the tire was released: the 10th week of 88 or 98.
To understand the 80s or 90s, you need to carefully look at whether there is a space after these numbers (a gap or a triangular stamp) on the sidewall or not.
If not: *108*, then this is the year 88, if there is: *108* or *108(the icon is a triangle)*, then this tire is the 98th year of manufacture.
Such difficulties are due to the fact that earlier tire manufacturers did not think that the tire would be used for more than 10 years. But after 2000, tire manufacturers came to a more convenient 4-digit marking of the production date on the wheel.
The following inscriptions and symbols are applied on the chamber and the rim tape:
a) product designation;
b) trademark and (or) name of the manufacturer;
c) the designation of this standard (without the year of approval);
d) date of manufacture of four digits (the first two indicate the serial number of the week, the last two - the year of manufacture);
e) technical control stamp;
f) BK - for butyl rubber chambers.
Tire load index
Li - load index
| Li | kg | Li | kg | Li | kg | Li | kg | Li | kg | Li | kg | Li | kg | ||||||
| 0 | 45 | 40 | 140 | 80 | 450 | 120 | 1400 | 160 | 4500 | 200 | 14000 | 240 | 45000 | ||||||
| 1 | 46,2 | 41 | 145 | 81 | 462 | 121 | 1450 | 161 | 4620 | 201 | 14500 | 241 | 46200 | ||||||
| 2 | 47,5 | 42 | 150 | 82 | 475 | 122 | 1500 | 162 | 4750 | 202 | 15000 | 242 | 47500 | ||||||
| 3 | 48,7 | 43 | 155 | 83 | 487 | 123 | 1550 | 163 | 4870 | 203 | 15500 | 243 | 48700 | ||||||
| 4 | 50 | 44 | 160 | 84 | 500 | 124 | 1600 | 164 | 5000 | 204 | 16000 | 244 | 50000 | ||||||
| 5 | 51,5 | 45 | 165 | 85 | 515 | 125 | 1650 | 165 | 5150 | 205 | 16500 | 245 | 51500 | ||||||
| 6 | 53 | 46 | 170 | 86 | 530 | 126 | 1700 | 166 | 5300 | 206 | 17000 | 246 | 53000 | ||||||
| 7 | 54,5 | 47 | 175 | 87 | 545 | 127 | 1750 | 167 | 5450 | 207 | 17500 | 247 | 54500 | ||||||
| 8 | 56 | 48 | 180 | 88 | 560 | 128 | 1800 | 168 | 5600 | 208 | 18000 | 248 | 56000 | ||||||
| 9 | 58 | 49 | 185 | 89 | 580 | 129 | 1850 | 169 | 5800 | 209 | 18500 | 249 | 58000 | ||||||
| 10 | 60 | 50 | 190 | 90 | 600 | 130 | 1900 | 170 | 6000 | 210 | 19000 | 250 | 60000 | ||||||
| 11 | 61,5 | 51 | 195 | 91 | 615 | 131 | 1950 | 171 | 6150 | 211 | 19500 | 251 | 61500 | ||||||
| 12 | 63 | 52 | 200 | 92 | 630 | 132 | 2000 | 172 | 6300 | 212 | 20000 | 252 | 63000 | ||||||
| 13 | 65 | 53 | 206 | 93 | 650 | 133 | 2060 | 173 | 6500 | 213 | 20600 | 253 | 65000 | ||||||
| 14 | 67 | 54 | 212 | 94 | 670 | 134 | 2120 | 174 | 6700 | 214 | 21200 | 254 | 67000 | ||||||
| 15 | 69 | 55 | 218 | 95 | 690 | 135 | 2180 | 175 | 6900 | 215 | 21800 | 255 | 69000 | ||||||
| 16 | 71 | 56 | 224 | 96 | 710 | 136 | 2240 | 176 | 7100 | 216 | 22400 | 256 | 71000 | ||||||
| 17 | 73 | 57 | 230 | 97 | 730 | 137 | 2300 | 177 | 7300 | 217 | 23000 | 257 | 73000 | ||||||
| 18 | 75 | 58 | 236 | 98 | 750 | 138 | 2360 | 178 | 7500 | 218 | 23600 | 258 | 75000 | ||||||
| 19 | 77,5 | 59 | 243 | 99 | 775 | 139 | 2430 | 179 | 7750 | 219 | 24300 | 259 | 77500 | ||||||
| 20 | 80 | 60 | 250 | 100 | 800 | 140 | 2500 | 180 | 8000 | 220 | 25000 | 260 | 80000 | ||||||
| 21 | 82,5 | 61 | 257 | 101 | 825 | 141 | 2570 | 181 | 8250 | 221 | 25700 | 261 | 82500 | ||||||
| 22 | 86 | 62 | 265 | 102 | 860 | 142 | 2650 | 182 | 8600 | 222 | 26500 | 262 | 86000 | ||||||
| 23 | 87,5 | 63 | 272 | 103 | 875 | 143 | 2720 | 183 | 8750 | 223 | 27200 | 263 | 87500 | ||||||
| 24 | 90 | 64 | 280 | 104 | 900 | 144 | 2800 | 184 | 9000 | 224 | 28000 | 264 | 90000 | ||||||
| 25 | 92,5 | 65 | 290 | 105 | 925 | 145 | 2900 | 185 | 9250 | 225 | 29000 | 265 | 92500 | ||||||
| 26 | 95 | 66 | 300 | 106 | 950 | 146 | 3000 | 186 | 9500 | 226 | 30000 | 266 | 95000 | ||||||
| 27 | 97,5 | 67 | 307 | 107 | 975 | 147 | 3070 | 187 | 9750 | 227 | 30700 | 267 | 97500 | ||||||
| 28 | 100 | 68 | 315 | 108 | 1000 | 148 | 3150 | 188 | 10000 | 228 | 31500 | 268 | 100000 | ||||||
| 29 | 103 | 69 | 325 | 109 | 1030 | 149 | 3250 | 189 | 10300 | 229 | 32500 | 269 | 103000 | ||||||
| 30 | 106 | 70 | 335 | 110 | 1060 | 150 | 3350 | 190 | 10600 | 230 | 33500 | 270 | 106000 | ||||||
| 31 | 109 | 71 | 345 | 111 | 1090 | 151 | 3450 | 191 | 10900 | 231 | 34500 | 271 | 109000 | ||||||
| 32 | 112 | 72 | 355 | 112 | 1120 | 152 | 3550 | 192 | 11200 | 232 | 35500 | 272 | 112000 | ||||||
| 33 | 115 | 73 | 365 | 113 | 1150 | 153 | 3650 | 193 | 11500 | 233 | 36500 | 273 | 115000 | ||||||
| 34 | 118 | 74 | 375 | 114 | 1180 | 154 | 3750 | 194 | 11800 | 234 | 37500 | 274 | 118000 | ||||||
| 35 | 121 | 75 | 387 | 115 | 1210 | 155 | 3870 | 195 | 12100 | 235 | 38700 | 275 | 121000 | ||||||
| 36 | 125 | 76 | 400 | 116 | 1250 | 156 | 4000 | 196 | 12500 | 236 | 40000 | 276 | 125000 | ||||||
| 37 | 128 | 77 | 412 | 117 | 1280 | 157 | 4120 | 197 | 12800 | 237 | 41200 | 277 | 128000 | ||||||
| 38 | 132 | 78 | 426 | 118 | 1320 | 158 | 4260 | 198 | 13200 | 238 | 42600 | 278 | 132000 | ||||||
| 39 | 136 | 79 | 437 | 119 | 1360 | 159 | 4370 | 199 | 13600 | 239 | 43700 | 279 | 136000 |
Tire speed index
I - speed index
km/h - speed limit in km/h
In our store you can find out. We always have unparalleled quality, trained staff, and great prices!
What are the letters? what are the numbers on the wheels? Reading, enlightening...
In the description of any tire model, there are values \u200b\u200b" SIZE" And " INDICES».
For example: 195/65 R15 91T
Let's decode these values:
195 - tire width in mm.
65
R15- meaning 15 MEANS DIAMETER in inches!, not RADIUS! a beech R
15
91
- index of maximum load per tire in kilograms.
Some tires have MAX LOAD(maximum load) followed by the values in kilograms and pounds.
Load index table.
| 62 | 265 | 95 | 690 | 128 | 1800 | 161 | 4625 |
| 63 | 272 | 96 | 710 | 129 | 1850 | 162 | 4750 |
| 64 | 280 | 97 | 730 | 130 | 1900 | 163 | 4875 |
| 65 | 290 | 98 | 750 | 131 | 1950 | 164 | 5000 |
| 66 | 300 | 99 | 775 | 132 | 2000 | 165 | 5150 |
| 67 | 307 | 100 | 800 | 133 | 2060 | 166 | 5300 |
| 68 | 315 | 101 | 825 | 134 | 2120 | 167 | 5450 |
| 69 | 325 | 102 | 850 | 135 | 2180 | 168 | 5600 |
| 70 | 335 | 103 | 875 | 136 | 2240 | 169 | 5800 |
| 71 | 345 | 104 | 900 | 137 | 2300 | 170 | 6000 |
| 72 | 355 | 105 | 925 | 138 | 2360 | 171 | 6150 |
| 73 | 365 | 106 | 950 | 139 | 2430 | 172 | 6300 |
| 74 | 375 | 107 | 975 | 140 | 2500 | 173 | 6500 |
| 75 | 387 | 108 | 1000 | 141 | 2575 | 174 | 6700 |
| 76 | 400 | 109 | 1030 | 142 | 2650 | 175 | 6900 |
| 77 | 412 | 110 | 1060 | 143 | 2725 | 176 | 7100 |
| 78 | 425 | 111 | 1090 | 144 | 2800 | 177 | 7300 |
| 79 | 437 | 112 | 1120 | 145 | 2900 | 178 | 7500 |
| 80 | 450 | 113 | 1150 | 146 | 3000 | 179 | 7750 |
| 81 | 462 | 114 | 1180 | 147 | 3075 | 180 | 8000 |
| 82 | 475 | 115 | 1215 | 148 | 3150 | 181 | 8250 |
| 83 | 487 | 116 | 1250 | 149 | 3250 | 182 | 8500 |
| 84 | 500 | 117 | 1285 | 150 | 3350 | 183 | 8750 |
| 85 | 515 | 118 | 1320 | 151 | 3450 | 184 | 9000 |
| 86 | 530 | 119 | 1360 | 152 | 3550 | 185 | 9250 |
| 87 | 545 | 120 | 1400 | 153 | 3650 | 186 | 9500 |
| 88 | 560 | 121 | 1450 | 154 | 3750 | 187 | 9750 |
| 89 | 580 | 122 | 1500 | 155 | 3875 | 188 | 10000 |
| 90 | 600 | 123 | 1550 | 156 | 4000 | 189 | 10300 |
| 91 | 615 | 124 | 1600 | 157 | 4125 | 190 | 10600 |
| 92 | 630 | 125 | 1650 | 158 | 4250 | 191 | 10900 |
| 93 | 650 | 126 | 1700 | 159 | 4375 | 192 | 11200 |
| 94 | 670 | 127 | 1750 | 160 | 4500 | 193 | 11500 |
Index 91 corresponds to the load 615 kg on one wheel.
For vans and light trucks, special, multi-ply reinforced tires with high load indexes are produced. And they are indicated depending on the load index - the inscription REINFORCED(6 layers, reinforced tire) or the letter " WITH» after the tire diameter, for example: 195/70R15C, (8 layers, truck tire).
T- speed index - the maximum allowable speed in km/h.
Speed index table.
| Speed index | Maximum speed, km/h | Speed index | Maximum speed, km/h | Speed index | Maximum speed, km/h |
| A1 | 5 | E | 70 | S | 180 |
| A2 | 10 | F | 80 | T | 190 |
| A3 | 15 | G | 90 | U | 200 |
| A4 | 20 | J | 100 | H | 210 |
| A5 | 25 | K | 110 | V | 240 |
| A6 | 30 | L | 120 | W | 270 |
| A7 | 35 | M | 130 | Y | 300 |
| A8 | 40 | N | 140 | VR | over 210 |
| B | 50 | P | 150 | ZR | over 240 |
| C | 60 | Q | 160 | ZR(Y) | over 300 |
| D | 65 | R | 170 |
Index T corresponds to the maximum speed 190 km/h.
Additional designations in the marking used by tire manufacturers.
M&S(Mud + Snow - mud plus snow) - This marking on the tire means that these tires are specially designed for winter or all-season.
All Season- All-season tire designed for year-round use.
rotation- Directional tire, the direction of rotation of which is indicated by an additional arrow on the sidewall of the tire.
outside And Inside(or Side Facing Out and Side Facing Inwards) - Asymmetric tires, when installing which you must strictly follow the rule of installing a tire on a disk. Inscription outside(outer side) must be on the outside of the vehicle, and Inside(inner side) - from the inside.
Left or Right- Means that the tires of this model are left and right. When installing them, you must strictly follow the rule of installing a tire on a car, the left ones only on the left, and the right ones, respectively, only on the right.
Tubeless or TL- Tubeless tire. If this inscription is not in the marking, then the tire can only be used with a camera.
Tube Type or TT- The tire must be operated with a tube.
MAX PRESSURE- The maximum allowable pressure in the tire, in kPa.
PSI- Pressure index from 20 to 85 (only for tires with index " WITH»).
Steel- Designation of the presence of steel cord.
E enclosed in a circle - The tire meets the requirements of ECE R30 (ECE regulation).
DOT- American safety standard.
XL or extra load, EL- the strengthened tire with the increased loading capacity.
RAIN, WATER, AQUA(or the "umbrella" icon in the sidewall marking) - Indicates that these tires are specially designed for rainy weather and have a high degree of protection against the effect of aquaplaning.
TWID- Projector wear indicator pointer. The indicator itself is a protrusion at the bottom of the tread groove. When the tread wears down to the level of this ridge, it's time to change the tire.
Energy- Tires with low rolling resistance, characterized by reduced fuel consumption.
American size designation.
There are two types of American tire markings.
The first one is very similar to the European one, only the letter “ P» ( Passanger- for a passenger car) or the letters " LT» ( light truck- light truck). For example: P 195/65 R 15 or LT 185/75 R 16.
And another marking, which is fundamentally different from the European one.
For example: 31х10.5 R15
Let's decode these values:
31
is the outside diameter of the tire in inches.
10.5
- tire width in inches.
R- tire of a radial design.
15
is the inner diameter of the tire in inches.
Truck tire marking
Truck tire marking - radial
For example: 10.00R20 146/143M
Let's decode these values:
10.00 - Tire profile width (in inches); .00 - designation of a full-profile tire for trucks.
Also the width is: 6.00 or 8.25 or 9.50 etc. - tire section width (in inches) - this is also a full section tire.
R- Radial.
20 - Tire mounting diameter (in inches).
146/143 - Load index. 146 - for a single wheel, 143 - for double (load on each wheel). (see load index table). The difference in the indexes of twin and single wheels is due to safety reasons, in case one of the four wheels on the axle fails, the remaining tire could withstand the additional load.
M- speed index - the maximum allowable speed in km/h. (see speed index table). Letter M corresponds to a maximum speed of 130 km/h.
Marking 146/143M means that with a single tyre, the load capacity of the tire is 3000 kg, and with a dual tyre, it is 2725 kg at a maximum speed of 130 km/h. At the same time, if the car moves at a lower speed, the bearing capacity of the tire can increase, in other words, the car can carry more weight.
There may also be values ns12, ns14, ns16 etc. - plyness of the tire. The number is the number of layers.
For example: 385/65R22.5
385
- tire profile width in mm.
65
- the ratio of the height of the tire (from the landing rim to the outer edge of the wheel) to its width in percent.
R- radial cord construction, cord threads in carcass layers have a radial (meridional) arrangement, i.e. directed from side to side.
22,5
- mounting size of the rim in inches (1 inch = 2.54 cm).
According to the rules of the road, tires on passenger vehicles must be changed when it does not exceed 1 mm. It is also mandatory to switch from summer tires to winter tires with a decrease in the average daily temperature. Therefore, any driver is interested in buying high-quality rubber that will last a long time, while providing good grip on the road surface.
To get complete information about a particular tire, just look at its sidewall, where the marking is located.
The most important parameters that interest the car owner:
- size;
- manufacturer;
- speed and load indices;
- seasonality - winter, summer, all-weather tires.
Size
The size for passenger cars is indicated using metric markings: 185/70 R13 or 205/55 R 16. Usually, drivers know what size they need. The same numbers and letters mean the following (for example, 205/55 R16):
- 205 - width in millimeters;
- 55 - the ratio of the width and height of the profile (205 times 0.55 equals 112 millimeters). That is, in this case we are dealing with low-profile sports tires;
- R16 - landing diameter, it also corresponds to the diameter of the disk in inches.
If we are talking about truck tires for domestic cars, then ordinary markings in millimeters are often used:
- 240x508 (240R508) - wheel for GAZ-3307 or PAZ;
- 300x508 - MAZ or KamAZ wheel.
In America, the dimensions are indicated in inches:
- 31x10.5 R16;
- 8.25R20 (similar to 240x508).
Please note: if the size of the landing diameter is preceded by English. the letter "R", this means that the tire is a radial type. If instead of a letter there is a hyphen - diagonal. Radial tires are more suitable for riding on hard surfaces, while diagonal tires are usually for row-crop tractors, mining trucks and SUVs.
Tire technical parameters
The type of rubber should correspond to the weight of the car and its speed characteristics. This parameter is displayed in this way: 112H or 88T. In this case we have:
In any auto shop you will find a plate where these parameters are indicated. Let's just say that for modern passenger cars, the lowest speed index is “Q”, corresponding to a speed of 160 kilometers per hour. These values can be selected with a small margin. If the stock is too large, then such rubber will be too hard.
seasonality
Tires need to be selected according to the season:
- snowflake - winter tires;
- M + S (Mud and Snow) - the tire retains its qualities when driving on snowy or polluted roads;
- All Seoson - all season.
If you see an umbrella or the inscriptions "Rain", "Water", "AquaContact" - rubber for driving on wet surfaces.
date of manufacture
An important parameter. According to GOST, tires should not be stored in a warehouse for more than five years. Even one year of storage is negatively reflected in the characteristics. The year of production is indicated in this way - 3614, 1215, 0513 and so on. The first two digits are the week number, the second two are the year. That is, if it is written, for example, 2412, this means that the rubber was made around May-June 2012 and it is better to look for something more recent.
Other marking
There are many other inscriptions on the tires:
Knowing these designations, you can easily select the perfect tires for your car.
All truck tires presented in the catalog of our online store meet high quality standards and are covered by a manufacturer's warranty.
The total number of found commodity items in the amount of 8.25-R20 is 14 pieces. The cost of the most inexpensive cargo tire in this size is only 6110₽ . Premium brands are somewhat more expensive in price, as the final cost is influenced by innovative technologies used in the production of rubber and high-quality components that make up the rubber compound. Maximum cost of a cargo wheel R20 8.25 in Moscow will be 6110₽.
Truck tires 8.25 r20 can be designed for driving or steering axle. Some sizes can be mounted on a trailed axle. When choosing truck tires, pay attention to the characteristic "Axis of application", which indicates the type of tire. The parameters also indicate the purpose of the rubber, its ply, country of production and indexes of speed and load.
Before buying, be sure to check out the photos, ratings, specifications, customer reviews and prices for truck tires 8.25R20. You can pay for the order both in cash and by bank transfer. The price is indicated for one tire and is automatically recalculated when the quantity changes.
All presented products are available for ordering and delivery in Moscow after placing and paying for the order.
Tire sizes.
Tire sizes according to GOST R 52899-2007 “Pneumatic tires for cargo motor vehicles and trailers. Specifications".
Tire sizes.
Tire sizes are represented by outer diameter, profile width and static radius for each truck and passenger car tire designation.
1. Tire sizes according to GOST R 52899-2007 “Pneumatic tires for cargo motor vehicles and trailers. Specifications".
Table 1. Light truck tires.
| Tire designation | Main dimensions, mm | Static radius ±1.0% (reference) | |
| OD ±1.0% | Profile width, no more | ||
| 185/80R15C | 674 | 188 | 310 |
| 215/80R16C | 755 | 218 | 355 |
| 225/75R16C | 744 | 228 | 338 |
| 5.90-13С | 620 | 154 | 292 |
| 6.40-13С | 645 | 172 | 303 |
| 215/90-15C | 777 | 218 | 364 |
| 6.50-16С | 760 | 180 | 360 |
| 175/80-16С | 692 | 178 | 326 |
Light truck tire designation 185/80R15C:
185 - designation of the nominal width of the tire profile in millimeters;
80 - nominal ratio of the height of the tire profile to its width,%;
15 - designation of the nominal fitting diameter of the rim in inches;
C is a symbol identifying a light truck tire.
R - radial tire.
Table 2. Tires for trucks.
| Tire designation | Rim designation | Main dimensions, mm | Static radius ±1.5% (reference) | ||
| recommended | permitted | Outside diameter ±1.5% | Profile width, no more | ||
| Diagonal | |||||
| 7,50-20 | 6,0-20 | 6,5-20 | 928 | 213 | 443 |
| 8,25-20 | 6,5-20 | 6,0-20 | 970 | 234 | 462 |
| 9,00-20 | 7,0-20 | 6,5-20 | 1012 | 256 | 481 |
| 10,00-20 | 7,5-20 | 8,0-20 | 1050 | 275 | 498 |
| 11,00-20 | 8,0-20 | 8,5-20 | 1080 | 291 | 511 |
| 12,00-20 | 8,5-20 | 9,0-20 | 1120 | 312 | 529 |
| 12,00-24 | 8,5-24 | 9,0-24 | 1220 | 312 | 576 |
| Radial chamber | |||||
| 7.50R20 | 6,0-20 | 6,5-20 | 928 | 210 | 440 |
| 8.25R20 | 6,5-20 | 6,0-20 | 962 | 230 | 453 |
| 9.00R20 | 7,0-20 | 6,5-20 | 1018 | 258 | 475 |
| 10.00R20 | 7,5-20 | 7,0-20 | 1052 | 275 | 491 |
| 8,0-20 | |||||
| 11.00R20 | 8,0-20 | 8,5-20 | 1082 | 286 | 505 |
| 12.00R20 | 8,5-20 | 9,0-20 | 1122 | 313 | 526 |
| 12/80R20 | 8,5-20 | 9,0-20 | 1008 | 305 | 472 |
| 12.00R24 | 8,5-24 | 9,0-24 | 1226 | 313 | 570 |
| 8.25R15 | 6,6-15 | 7,0-15 | 836 | 234 | 385 |
| Radial tubeless | |||||
| 10R22.5 | 7.50×22.5 | 6.75×22.5 | 1020 | 254 | 476 |
| 11R22.5 | 8.25×22.5 | 7.50×22.5 | 1050 | 279 | 489 |
| 12R22.5 | 9.00×22.5 | 8.25×22.5 | 1084 | 300 | 504 |
| 385/65R22.5 | 11.75×22.5 | 12.25×22.5 | 1072 | 389 | 505 |
| 275/80R22.5 | 8.25×22.5 | 7.50×22.5 | 1012 | 276 | 470 |
| 295/80R22.5 | 9.00×22.5 | 8.25×22.5 | 1044 | 298 | 490 |
| 315/80R22.5 | 9.00×22.5 | 9.75×22.5 | 1076 | 312 | 499 |
| 350/80R22.5 | 11.75×22.5 | 12.25×22.5 | 1122 | 355 | 526 |
| 11/70R22.5 | 8.25×22.5 | 7.50×22.5 | 962 | 279 | 447 |
| 315/70R22.5 | 9.00×22.5 | 8.25×22.5 | 1014 | 312 | 467 |
| 425/65R22.5 | 13.00×22.5 | 14.00×22.5 | 1122 | 425 | 525 |
An example of a tire designation: 8.25R20 is a tire designation, where 8.25 is the designation of the nominal tire section width in inches, R is the letter index of the radial tire, 20 is the designation of the nominal rim diameter in inches.
Note.
Tire profile widths are measured on the recommended rim. When mounted on a permitted rim, the profile width changes by 40% of the difference between the widths of the recommended and permitted rims.
| Tire size | Standard rim | Permissible rim | Tread width, mm | Outer diameter, mm | Full turn distance, mm |
| 7.50R16 | 6.00 | 5.50 6.50 | 216 | 803 | 2449 |
| change to | |||||
| 225/75R17.5 | 6.75 | 7.5 | 224 | 784 | 2391 |
| 245/70R17.5 | 7.50 | 6.75 | 252 | 780 | 2379 |
| 8.25R16 | 6.50 | 6.00 | 230 | 850 | 2593 |
| change to | |||||
| 235/75R17.5 | 6.75 | 7.50 | 236 | 800 | 2440 |
| 245/70R19.5 | 7.50 | 6.75 | 252 | 838 | 2556 |
| 265/70R19.5 | 7.50 | 8.25 | 258 | 866 | 2641 |
| 8.25R20 | 6.50 | 7.00 | 232 | 965 | 2943 |
| change to | |||||
| 255/70R22.5 | 7.50 | 8.25 | 254 | 925 | 2821 |
| 10.00R20 | 7.50 | 8.00 | 274 | 1052 | 3209 |
| change to | |||||
| 295/80R22.5 | 9.00 | 8.25 | 298 | 1050 | 3203 |
| 11R22.5 | 8.25 | 7.50 | 277 | 1054 | 3215 |
| 11.00R20 | 8.00 | 8.50 | 288 | 1090 | 3325 |
| change to | |||||
| 12R22.5 | 9.00 | 8.25 | 300 | 1070 | 3294 |
| 315/80R22.5 | 9.00 | 9.75 | 315 | 1080 | 3325 |
| 295/80R22.5 | 9.00 | 8.25 | 298 | 1050 | 3203 |
| 12.00R20 | 8.25 | 9.00 | 315 | 1120 | 3416 |
| change to | |||||
| 13R22.5 | 9.75 | 9.00 | 316 | 1122 | 3422 |
| 315/80R22.5 | 9.00 | 9.75 | 315 | 1080 | 3325 |
2. Tire sizes for passenger cars according to GOST 4754-97 are presented in table 3.
Table 3
| Tire designation | Road tire dimensions, mm, on recommended rim | |||
| Outer diameter, (prev. off. | Profile width, no more | Static radius (prev. off. | Rolling radius (reference) | |
| ±1%) | ±1%) | |||
| 135/80R12 | 521 | 140 | 239 | 252 |
| 155/80R13 | 578 | 157 | 263 | 279 |
| 165/80R13 | 596 | 167 | 271 | 287 |
| 175/80R13 | 608 | 172 | 276 | 293 |
| 165/80R14 | 622 | 172 | 284 | 301 |
| 175/80R16 | 686 | 178 | 315 | 330 |
| 155/70R13 | 548 | 157 | 252 | 267 |
| 165/70R13 | 568 | 167 | 260 | 275 |
| 175/70R13 | 580 | 176 | 265 | 281 |
| 185/70R13 | 598 | 188 | 272 | 287 |
| 175/70R14 | 600 | 176 | 278 | 293 |
| 185/70R14 | 624 | 187 | 285 | 301 |
| 205/70R14 | 652 | 206 | 295 | 313 |
| 185/65R13 | 568 | 191 | 260 | 275 |
| 165-13/6,45-13 | 610 | 167 | 285 | 291 |
| 175-13/6,95-13 | 610 | 178 | 282 | 288 |
An example of the designation of a 165/80 R13 tire: 165 is the designation of the nominal width of the tire profile in millimeters, 80 is the series (the nominal ratio of the height of the profile to its width in percent), R is the letter index of the radial tire, 13 is the designation of the tire fit diameter corresponding to the nominal diameter rims in inches;
3. Tire sizes according to GOST 13298-90 “Tyres with adjustable pressure. Specifications".
Table 4
| Tire designation | Ply rate | Rim designation | Tire dimensions, mm | ||
| 12,00-18 | 8 | 465-228 | 1084±8 | 337 | 505±5 |
| (228G-457) | |||||
| 13,00-18 | 8 | 465-228 | 1132±8 | 351 | 525±5 |
| (228G-457) | |||||
| 12,00-20 | 8 | 514-228 | 1142±8 | 335 | 530±5 |
| (228G-508) | |||||
| 14,00-20 | 10 | 515-254 | 1260±10 | 390 | 583±5 |
| (254G-508) | |||||
| 16,00-20 | 10 | 515-292 | 1384±10 | 460 | 632±5 |
| (292-508) | |||||
| 1200 x 500-508 | 10 | 514-400 | 1177±15 | 481 | 540±7 |
| (400G-508) | |||||
| 1220 x 400-533 | 10 | 533-310 | 1200±15 | 418 | 560±7 |
| (310-533) | |||||
| 1300 x 530-533 | 12 | 533-440 | 1280±15 | 525 | 585±7 |
| (440-533) | |||||
| 1500 x 600-635 | 10 | 500-635 | 1500±15 | 610 | 680±10 |
| 14 | |||||
| 1600 x 600-685 | 24 | 500-685 | 1590±15 | 600 | 725±10 |
Example 1. Wide profile tire 1300 x 530 - 533, where
1300 - conditional outer diameter of tires in millimeters;
530 - conditional tire profile width in mm;
533 - conditional rim diameter in mm.
Example 2. Tire of a conventional profile 12.00-18, where 12.00 is the conditional width of the profile in inches; 18 - conditional rim diameter in inches.
