Tire speed rating tells you the maximum service speed for a tire. As well as its diameter and width, it also explains its construction method, its maximum speed and load ratings, and even. A tyre speed rating indicates the maximum speed a tyre is legally approved for.
The two digits before the speed rating symbol as show in the diagram as 91V are the load rating. Tire speed rating is different than tire size. 23 rows · Tyre Speed Rating Guide. LOAD AND SPEED RATINGS. For example, if a tire has a load index of 92, it can support 1, 389 pounds at maximum air pressure. View our tire speed rating chart and visit your local Tires Plus to learn more today!
This number indicates the amount of weight it is able to carry. You can always increase the speed rating of the tires on your vehicle for improved performance, but can never decrease it without reducing the vehicle top speed to that of the lower speed rating selected. This is unusual, but with some top range and vintage cars, the wheel construction and speed rating come after the Aspect Ratio rather than the Load Index.
Oct 05, · NOTE: ALWAYS use the exact tire size, type, speed and load rating recommended by the manufacturer of your motorcycle. Tyre Load Index Chart. The load index for most passenger car tyres ranges from 75- 100. The tire load index lets you know the load carrying capacity of a tire.
Lower profile sizes tend to have lower load ratings compared to higher profile ones. In this case, following the two digits used to identify the aspect ratio are the letters ZR to identify the tire' s speed rating ( Z) and its internal. Mixing Speed Ratings.
Speed ratings are issued by the tire manufacturers and they do not recommend that any of their products be used to exceed legal speed limits. For example, if your tyre’ s sidewall markings were 235/ 45R18 98Y, the last section of the sidewall markings ‘ 98Y’ indicate the load index and speed symbol. As with load rating, you must be sure when buying a new tyre that you are buying one with the right speed rating for. Tire Speed Rating and Why It Matters.
The tyres load index and speed rating can be found by looking at the two digit number and letter at the end of the sequence displayed on your tyre. When replacing your tires, consult the vehicle tire placard or the owner' s manual for the correct size. The speed rating indicates the maximum speed the tyre can handle. What is load rating?
It is important that you are 100% sure that you know what capacity should be used on your vehicle. Tyres receive a speed rating based on a series of tests which measure the tyres capability to handle a set speed for a prolonged period of time. The load rating is expressed by a two or three- digit number and is located on the tyre sidewall. Load Index Table. In other words, it’ s the amount of weight your tire can support safely. The load capacity of a tyre determines what weight each tyre is able to carry.
When it comes to buying new tyres, you can’ t live without this information – understanding tyre speed ratings and how they affect which tyres you can use on your car is essential. The load indexes of the tires used on passenger cars and light trucks, typically range from 70 to 110. Tyre load and speed rating guide. NOTE: ALWAYS use the exact tire size, type, speed and load rating recommended by the manufacturer of your motorcycle. Speed Ratings are most frequently found after the Load Index which follows both. Speed rating of a tyre is based on laboratory tests, under specific controlled conditions, where the tyre is pressed against a large diameter metal drum to reflect its appropriate load.
Load rating and speed index should be looked at together when buying new tyres. The load index is identified as a part of the tire size designation or the tire' s service description, together with the speed index ( e. It’ s represented by a letter. The first two digits ( 87S) represent the tire' s load index and are followed by a single letter ( 87S) identifying the tire' s speed rating.
In general, a higher speed rating results in better car handling. If replaced in pairs, the new tyres should be of the same or higher speed rating. The speed rating of a tyre is represented by a letter of the alphabet at the end of the tyre size code and indicates the maximum speed capability of the tyre. Your speed rating is indicated by a letter on your tyre from the following table:. The Load Index is an assigned number ranging from 0 to 279 that corresponds with the maximum load carrying capacity of a tyre.
Tyre load and speed rating guide. If the vehicle tire placard and/ or owner' s manual specify speed rated tires, the replacement tires must have the same or higher speed rating to maintain vehicle speed capability. Tire speed rating or the speed index/ symbol specify the top speed at which the tire can carry a load corresponding to its load index, under service conditions specified by the manufacturer. For Load Range " B" tires, ETRTO ( ISO- Metric) standards specify the load index rating at an inflation pressure of 36 psi ( 250 kPa) ( table below), while P- Metric standards measure the load capacity at an inflation pressure of 35 psi ( 240 kPa). To give you the maximum choice of tyres for your vehicle our search results include tyres with your chosen speed rating or with a higher rating. Tyre Load Rating Guide.
The higher the tire' s load index, the greater will be its capacity to carry load. On your tyre’ s sidewall you’ ll see a letter ( normally at the end, just. A speed rating isn' t, however, a recommendation to exceed speed limits, and doesn' t indicate how well a tire handles or corners.
Tire speed rating is the top speed a tire can safely keep over time. Tyre Load & Speed Rating Tyre Load Index and Speed Rating information. Size designation: 205/ 60R15 91V - 91V in " service description" means this tyre can carry maximum 615 kg/ 1356 lb while going up to the maximum speed of 240kmh/ 150mph). Tyres have different load ratings but generally a tyre of the same size usually are the same.
Motorcycle Tire Speed Rating. The load index number and speed symbol shown on a tyre correspond to the maximum load- carrying capacity of that tyre and its maximum speed capability. View the speed rating chart for South Africa below. As a car owner, it’ s important to understand tyre speed rating, load index, and tyre size. A Complete Guide To Tyre Speed Ratings. The maximum capacity per tyre is indicated in kilogram ( kg).
The tyre load rating defines the maximum load of a tyre moving at the maximum permissible speed. The load- rating is essentially the maximum weight the tyre can carry. These ratings are set based on tests which engineers are required to run the tyre at 6. It is vital that you check with your vehicle handbook as to what capacity should be put on your car. Tyre manufacturers recommend not mixing and matching tyres with different speed ratings on your vehicle.
Use the information on this page for general reference only and not for. The speed rating is identified as a part of the tire size designation or the. Speed Rating Today, the only tires that continue to include the speed rating " in" the tire size ( P225/ 50ZR16) are Z- speed rated tires. Your tyre’ s speed symbol and load index markings are located on the sidewall, next to the tyre size markings. Service descriptions are required on all speed rated ( except for Z- speed rated) tires manufactured since 1991.
The tyre speed rating chart was established to match the speed capability of the tyre to that of the vehicle. The load index indicates how much weight a tire can safely carry at maximum air pressure, and the speed rating represents the maximum operating speed. If you’ re still confused, if you just need to find out your tire speed rating or if you have no idea what the tire load index or Z speed means, then you’ re in the right place. Tyre load and speed rating guide. Tire Rating Charts: Speed Rating and Load Index Load Index The load index is an assigned numerical value, that identifies the tire' s ability to carry load. A service description identifies the tire' s load index and speed rating.
2 mph steps, in 10 minute increments, until the required speed has been met. Never try to second- guess the designers and engineers with regards to tire size, type, speed or load rating! On your tyre’ s sidewall one of the numbers ( normally just after the diameter) you will see is it’ s load rating. Multiply that by four tires ( 4 x 1, 389 = 5, 556 pounds) to get your car’ s maximum load carrying.
The Speed Index is an assigned letter ranging from J to Z that corresponds to the reference maximum speed at the associated load index. Tyre load and speed rating guide. Speed Ratings Speed ratings indicate at what level of sustained speed a tire has been tested and certified safe, by the manufacturer. The ratings that are international however are the Speed Rating and Load Index rating. 2 mph sets in 10 minute increments until the desired speed has been met.
Speed Category - A category assigned to a tyre, which denotes the maximum speed for which the use of the tyre is rated. Speed Symbol - A symbol indicating the speed category at which the tyre can carry a load corresponding to its Load Index under specified service conditions.