Radial construction
This letter indicates the type of construction used within the casing of the tyre, which in our example is “R” for Radial construction. Other examples are “B” for Bias-ply or “D” for Diagonal construction. Radial tyres are the most common tyres on the road today.
What does the letter “R” Mean on a tyre?
This tells you how a tyre is constructed. In this example, the “R” means that the tyre has radial construction. This is where the internal ply cords extend across the casing from bead to bead, in a radial direction. Less common tyre constructions include diagonal or bias ply, represented by the letter “D”. 4. Rim diameter in inches
What are tyre markings?
Next in our series of tyre markings is a letter instead of a number. This letter indicates the type of construction used within the casing of the tyre, which in our example is “R” for Radial construction. Other examples are “B” for Bias-ply or “D” for Diagonal construction. Radial tyres are the most common tyres on the road today.
What does B mean on a tyre?
⦾ B: bias belt (sidewalls are the same material as the tread, leading to a rigid ride) This number represents the diameter of the wheel rim that the tyre will be attached to which the tyre will be fit in inches. This measurement is of the diameter of the wheel that the tyre is designed to fit.
What does 17 mean on a tyre?
R means radial which refers to a common tyre construction for passenger vehicles. The final number is a measurement in inches of the diameter of the wheel the tyre will be fitted to. In this case, 17 means the tyre is fitted to a 17-inch wheel. Yes, inches. Tyres mix metric and imperial measurements. Just to keep you on your toes.
What does XL mean on a tyre?
Extra Load
Generally speaking, the tyre name XL is used for heavy duty tyres. However, the labelling varies between tyre manufacturers. Sometimes you might have XL tyres that are also labelled “reinforced” (RF or RFD), or models labelled EL (Extra Load).
What are XL tyres?
The acronym XL stands for Extra Load. But it doesn’t apply to cars carrying a heavy load ‑ although they’ll probably need XL tyres. It refers to the weight of the vehicle the tyre will have to support. It’s worth checking whether your car needs these.
Why do XL tyres need higher air pressure?
The load capacity of a reinforced tyre also decreases with decreasing air pressure, so XL tyres need higher air pressure. This is the only way to ensure a higher load-bearing capacity. The stipulated tyre speed rating and load index of your XL tyres can normally be found in the last characters on the sidewall.
Can You exceed the maximum load rating on XL tyres?
It’s worth noting, however, that you should never exceed the maximum load rating for your vehicle – regardless of the maximum load rating of the tyres fitted. What’s the difference between XL tyres and Runflats?
What is the difference between xL and extra load tires?
XL Tires are long-lasting load tires, XL best tires for heavy loads. Extra Load tires have better damage resistance. In the normal world, XL means extra-large. However, in the tyre terminology, XL means ‘Extra Load.’
What does C mean on a tyre?
commercial-rated tire
The C-Type tire, on the other hand, is specifically meant as a commercial-rated tire, with a higher load rating for a given size than many LT tires. These C-Type tires will show the letter “C” immediately after the wheel diameter in the tire code.
What do all the codes on my tyre mean?
The diagram here outlines and identifies the different codes on the sidewall of your tyre. 16 Extra Load: Denotes higher load capacity than standard tyre.
What does a Z Tyre mean?
Letters ranging from A to Z represent the speed rating. Each letter denotes the maximum speed a tyre can sustain under its recommended load capacity. In our example, “H” is equivalent to a maximum speed of 130 mph (209 kph). Even though a tyre is capable of performing at this speed, drivers should not exceed legal speed limits.
What does V mean on a tyre?
In this case, the letter V means that the tyre is rated for sustained speeds up to 149 miles per hour. Your tyre’s sidewall may also show the maximum air pressure, a traction rating and a treadwear rating, as well as the legally required DOT code, among other information. All of these aspects are explained in more detail below.
Do I need A C tyre?
Yes C = commercial meaning the tyre made to carry heavier weight and generally commercial (lorry / van ) need this kind of tyre to carry heavy LOAD for those if only for private use like carrying 3-5 passenger you actually do not needs this but you may have issue when come to Veh inspection.
What does Z mean on tyres?
high performance tire
SPEED RATING Z While it nearly always means a high performance tire for high-performing sports cars, “Z” may actually appear in the middle of a tire’s size information. When it does, it represents either a maximum speed of more than 149 mph (240 kph) or 186 mph (300 kph).
What does Z mean on a tire?
While it nearly always means a high performance tire for high-performing sports cars, “Z” may actually appear in the middle of a tire’s size information. When it does, it represents either a maximum speed of more than 149 mph (240 kph) or 186 mph (300 kph). Which of those speeds it refers to will depend on the specific tire.
Is a w & y tire a “Z”?
However, if a tire is rated W & Y, which is 168 mph and 186 mph respectively or more, tire manufacturers will still list the tire as a “Z.” Exotic sports cars are fitted with the W & Y tires because of their high speeds and performance levels. Therefore, you should consult your tire manufacturer if the rating is confusing.
Do Z and ZR tires have the same speed rating?
With that said, Z and ZR-rated tires often have the same speed rating. Usually, both of these ratings mean that the car can go above 149 mph. In actuality, the “Z” rating is broken down into smaller categories of V, W, and Y. When used to refer to speed, these letters all mean that the tire can go above 149 mph.
How do you know if a tire is ZR 19?
After all, it’s difficult to match tires when different companies have labeled the same kind of tire somewhat differently. In a label of “ZR 19”, the Z refers to the speed rating. All tires that go above 186 mph are required to have a Z speed rating. In other words, this is a quick way to tell that the tire can go above 186.
What is V and Y in tyres?
V: 149mph. Z: 150+ mph. W: 168mph. Y: 186mph.
What is a tyre speed rating?
A tyre speed rating indicates the maximum speed a tyre is legally approved for. You can find your tyres’ speed rating on the sidewall of the tyre as shown in the image.
Is a Y speed rated tire more comfortable?
Therefore, a W speed-rated tire should be a bit more comfortable than a Y speed-rated tire, but it all comes down to how well an individual tire model performs. If we were to compare two identical models, and if the only difference is the speed rating, the tire with a lower speed rating is likely the more comfortable one.
How fast can a tyre go?
Z-rated high-performance tyres are rated for speeds in excess of 149mph. Confusingly, W-rated tyres are rated at a higher speed in excess of 168mph. Y-rated tyres are rated in excess of 186mph. See the full list below. Tyre speed ratings should be matched to the official top speed of your car.
What does h mean on a tire?
In earlier incarnations of the speed rating system, “H” stood for “hhigh performance,” which is why it maintains an unusual position in the speed rating spectrum today. Once the highest speed rating a tire could have, “V” used to represent a maximum of 149 mph (240 kph) or more. Nowadays, it means 149 mph but no higher.
What is Z or ZR in tyres?
Before 1990, ZR was used for high-performance tyres. It’s no longer typically used, and is now categorised into V, W, Y, or Z ratings. However, you may still see this rating referenced on older tyres, vehicle handbooks, and even some older tyres that are still safe to use.
What is a ZR tyre?
ZR basically means the tyre is adapted for speeds above 149 mph. ZR tyres includes the speed ratings V (149mph), W (168mph) and Y (186mph). Before 1990, the manufacturers used “ZR” to mean high performance tyres before the ratings got refined with W, Y…
What does ZR mean on a car?
Since automobiles have significantly developed and the car speed has exceeded what was thought impossible – 150 mph, the ZR symbol was created to imply the case. ZR is split into Y, W, and the original Z-rated tires. You can double-check with the tire manufacturers when buying new tires to see what appropriate speed rating you need: W, Y, or Z.
What does TL TT mean on tyres?
Apart from the structure of a tyre, size and profile, tyres can also be distinguished by whether they are tube type (TT) or tubeless (TL) tyres.
What are the differences between TT and TL tyres?
Truck Apart from structure (radial or diagonal), size and profile, tyres can also be distinguished by whether they are TT (tube type) or TL (tube less) tyres. In this case, the former features an inner tube while the latter does not. Air improves load capacity
Which tyre is tubeless?
If the air-tight liner is built into the tyre, which is far more common on modern or high-speed tyres, then the tyre is Tubeless (TL) because an inner tube is not required. Of the two tyre types (TT and TL), tyres with an inner tube are a more traditional option. In this case, the inner tube – which has its own valve – is placed inside the tyre.
What are the different types of tyres?
Classification of tyres: In general, there are two major classes of tyres, according to the presence or absence of tubes in them. Thus, they are called ‘tubed tyres’ and ‘tubeless tyres’ respectively. Furthermore, based on the construction or skeleton of tyres known as carcass, tyres are classified into the following main types: 1.
What does GT tyre mean?
“GT” means the tyre is designed for heavier motorcycles such as the BMW R 1200 RT, Kawasaki 1400GTR, Yamaha FJR1300, among others. It’s not recommended to mount it on your middleweight bike just because “the GT version lasts longer.”
What does 225 50 r17 mean?
What 225/50R17 Means. The number 225 identifies the tire section width (the measurement of the tire from sidewall to sidewall in millimeters). This tire has an aspect ratio of 50 means that the tire’s section height is 50% of the tire’s section width.
What does 225-50R17 mean?
On this page you’ll find a color-coded explanation of the 225-50R17 tire code. 225. This number indicates that your tire has a width of 225 millimeters. 50. This number means that your tire has an aspect ratio of 50%. In other words, your tire’s sidewall height (from the edge of the rim to the tire’s tread) is 50% of the width.
What is a 225/50/17 tire?
The diameter is measured in inches and tells you the size of the rim or wheel that the tire will fit onto. For example, a tire with a width of 225, a height of 50, and a diameter of 17 would be considered a 225/50/17 tire. Every tire sidewall contains the tire type, tire width, aspect ratio, and construction.
What does 225 mean on a tire?
This number indicates that your tire has a width of 225 millimeters. The tire size was designed to fit rims or wheels that are 17 inches in diameter. This number means that your tire has an aspect ratio of 50%. In other words, your tire’s sidewall height (from the edge of the rim to the tire’s tread) is 50% of the width.
What does p225/50r17 93v mean?
On this page you will find a detailed explanation of the P225/50R17 93V tire code. This number indicates the tire has a width of 225 millimeters. This number means that your tire has an aspect ratio of 50 %. In other words, your tire’s sidewall height (from the edge of the rim to the tire’s tread) is 50 % of the width.
What does H mean on car tyres?
Each letter denotes the maximum speed a tyre can sustain under its recommended load capacity. In our example, “H” is equivalent to a maximum speed of 130 mph (209 kph).
What does h mean in a tyre rating table?
As with the load index, this letter references a look-up table which indicates the maximum permissible speed of a tyre. In this example, “H” means the vehicle has a maximum speed of 130mph under the maximum load. “Although a speed rating table references the maximum speed a tyre can move under load, you should not use this as a threshold.
What are H tires?
Such vehicles have a high horsepower, which translates to more speed. You will also see them on luxury vehicles. According to automobile pundits, H tires are on the lower end of sports cars. You may use these tires for amateur racing or beginner stages due to their low-speed support value.
Are H rated tires safe?
Opting for H-rated tires is fine – provided that you keep to the 130-mph top speed limit instead of the 149-mph limit supported by a V-rated tire. To add, make sure to use the same speed rating on all fours for best performance. As a precaution, never opt for tires with a speed rating two tiers lower than the original requirement for your vehicle.
What does the final tyre marking mean?
The final tyre marking in this string represents the speed rating. As you might have guessed, this denotes the maximum speed a tyre can sustain when it is correctly inflated and under load. As with the load index, this letter references a look-up table which indicates the maximum permissible speed of a tyre.
What is R1 vs R2 tires?
Tread depth of R2 tires is approximately twice as deep as R1 tires. R2 tires also have the widest spacing between lugs to allow mud to shed easier. The wide-spaced lugs can show extra wear and cause problems with vibration when roading.
What is the difference between R1 and R3 tires?
A variation of the R1 tire, known as the R1W, is designed for use in especially wet and soggy conditions. The tread depth of an R1W generally runs about 20 percent deeper than on an R1 tire. So although they perform similarly on dry ground, R1W tires offer better performance when the going gets tough. R3 tires are known as turf tires for a reason.
What is the difference between R1W and R2?
R1W is defined as having a lug height about 20 percent deeper than an equivalent R1 tire, but this could vary from 15 percent to 35 percent depending on the tire and manufacturer. R2 is a tread type used typically with cane and rice or other crops grown in wet muck or flooded fields.
What are R2 tires?
Although they don’t receive as much attention as R1, R3 and R4 tires, R2 tires do exist. With treads twice as deep as on R1 tires, R2 tires are geared for use in extremely wet conditions—standing water, for example, as found in rice paddies. But the extreme design of R2 tires makes them less suitable for general use.
Can you put R1 and R2 treads on the same tractor?
Typically, tires with R2 tread should be matched on the front and rear of a tractor while R1 and R1W treads can be mixed or matched on the same tractor to meet requirements or preference. Turning radius is measured from the center of the turn to the center of the outside tire (1).
What does 205 55r16 mean?
Height is the next standard parameter in tyre size (B). Marking 205/55 R16 means that the height is 55% of the width. It is easy to calculate: 205 • 55% (0.55) = 112.75 mm. The larger the B value in the formula, the higher the tyre will be and vice versa.
What is HR vs R tires?
“R” means radial tire. They’re all radials nowadays. Speed ratings are usually inserted before the “R.” The most common speed ratings are HR (good for 130mph), VR (149 mph), and ZR (more than 149 mph).
What is the difference between R and ZR tires?
ZR-rated tires are well-known for reliable performance at high speeds and provide reliable and safe performance but are currently divided into individual speed ratings. On the other hand, the R radial wheel receives high strength and durability. ZR tires are perfect for high-performance vehicles as it offers faster speed than R.
What is a R speed tire?
R speed tires are rare but can be found on some heavy-duty light truck (LT) tires, as well as studdable and studless winter tires. An S speed rating indicates the tire has been approved for speeds up to 112 mph (180 km/h) under optimal conditions.
What is the difference between V rated and H rated tires?
While the V rating technically allows for a higher maximum speed, practically speaking, this a distinction without much of a difference (in light of U.S. speed limits). Like H tires, Vs can deliver a taste of the performance attributes associated with high speed rated and high-performance tires (W, Y, and Z).
How do you know if a tire is a radial or H rated?
There are two ways the speed rating will be indicated on the tire sidewall. The older method puts the speed rating next to the “R” for radial in the size. For example, 225/50HR16 would be an H-rated tire and 225/50VR16 would be the same size tire except V-rated.
What does 88 mean on a tyre?
What is the tyre load index rating?
| LOAD INDEX | KG MAX. LOAD PER TYRE |
|---|---|
| 88 | 560 |
| 89 | 580 |
| 90 | 600 |
| 91 | 615 |
What does 88H v t mean in tire specs?
H , V and T are regarding to max. speed – V is about 230km/h ; H is about 200KM/h; T is about 190km/h, and so on. Q: What does 88h and 88V mean in tire specs? Write your answer… Still have questions? 88 is the max weight for the tyre, h refers to the max speed allowed for the tyre, in this case 139 mph.
What is 88 h tyre?
Write your answer… Still have questions? 88 is the max weight for the tyre, h refers to the max speed allowed for the tyre, in this case 139 mph. What does a U S Army 88H Cargo Specialist do?
What does 235 mean on a tyre?
The first number is the easiest and measures the width of the tyre in metric millimetres. 235 means your tyre is 235mm wide. The second number refers to the profile of the tyre or the height of the tyre’s sidewall. The number isn’t in millimetres but is instead an aspect ratio measurement of how the height relates to total width.
What does 55 mean on a tyre?
The number “55″ refers to the nominal aspect ratio, i.e. the ratio of the tyre’s height to its width. In this case, the height of the sidewall is 55 percent of the nominal width. The abbreviation “R” says something about the construction and describes the way the cords of the casing are arranged.
Which is better D or R tires?
A radial tire flexes more than a bias tire, giving it better ground contact, traction, stability, and tread wear. A radial tire will normally run cooler than a bias ply tire, especially when the tire is under a load. A tire that runs cooler will last longer. For those reasons I would recommend an R tire over a D tire.
What does R Mean on a tire?
R indicates the construction used within the tires casing. R stands for radial construction. B means belted bias and D stands for diagonal bias construction. 17 The last dimension listed in the size is the diameter of the wheel rim, which is most often measured in inches. What’s the difference between 205 and 235 tires?
Are radial tires better than bias ply?
Radial tires are preferred over bias ply, but if the rest of your tires are bias ply and now you have a single radial you would want to strongly consider having all tires match. The main difference between a radial ply and a bias ply tire is how the tire is constructed.
Do I need different wheels for radial tires?
The same wheels can be used for both bias and radial tires. You do not need different wheels for radial tires. The tire you have now that is labeled ST205/75D14 is a bias tire because the D inside the tire size means diagonal or bias ply construction. A radial trailer tire will be labeled as ST205/75R14.
What is a D rated tire?
D-rated tires are classified under load range D. Built for light trucks, they have a maximum pressure of 65 PSI (450 kPa). They also have an 8 ply rating which enables them to be inflated and maintain their round shape. D-rated tires only provide more capacity if they are inflated to the higher-rated design pressure.
